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https://www.reddit.com/r/Music/comments/1dphhe/looking_to_start_making_beats_where_do_i_start/
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math
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OK, so since my sophomore year of college is over, I have decided that to dabble in some beat making this summer. The only problem being, I have no idea where to even start. I am not looking to drop hundreds of dollars since I am just starting. What program would be the best for a beginner? I also have a macbook if that matters as far as which program. Thanks!
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CC-MAIN-2018-47
| 362 | 1 |
http://mathhelpforum.com/advanced-applied-math/189673-fourier-transform-print.html
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math
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I'm trying to find the Fourier transform of a sinc function without using the duality property. Here's what I got so far:\
Now let's not condier the complex exponentials out of the sine for now, include them later and make use fo the shifting property of the complex exponential.
. Letting and eliminating the odd integral of we get .
So the integral . When adding the complex exponentials, we get this -1/2 shifted to the right and to the left by 1/2. What does that mean? Am I doing something wrong?
NB: I know the FT of a sinc is a rect
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s3://commoncrawl/crawl-data/CC-MAIN-2017-17/segments/1492917122955.76/warc/CC-MAIN-20170423031202-00450-ip-10-145-167-34.ec2.internal.warc.gz
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CC-MAIN-2017-17
| 539 | 5 |
http://www.mywordsolution.com/question/when-a-government-wants-to-increase-tax-revenue/925910
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math
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Elasticity, Production and Cost in the Firm
When a government wants to increase tax revenue, they will often increase the sales tax on gasoline. Using price elasticity of demand, describe why the tax would be placed on gasoline rather than, say, yachts. What might be the long run effect of raising the price of gas?
The shape of the long-run cost curve is determined by economies and diseconomies of scale. Contrast this curve with the short-run cost curve as it relates to increasing and diminishing marginal returns to labor.
(Determinants of Price Elasticity) Why is the price elasticity of demand for Coca-Cola greater than the price elasticity of demand for soft drinks generally?
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s3://commoncrawl/crawl-data/CC-MAIN-2017-17/segments/1492917123635.74/warc/CC-MAIN-20170423031203-00219-ip-10-145-167-34.ec2.internal.warc.gz
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https://fr.slideserve.com/leyna/555-timer
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math
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555 Timer Introduction: • The 555 Timer is one of the most popular and versatile integrated circuits ever produced! • “Signetics” Corporation first introduced this device as the SE/NE 555 in early 1970. • It is a combination of digital and analog circuits. • It is known as the “time machine” as it performs a wide variety of timing tasks. • Applications for the 555 Timer include: • Ramp and Square wave generator • Frequency dividers • Voltage-controlled oscillators • Pulse generators and LED flashers
555 timer- Pin Diagram The 555 timer is an 8-Pin D.I.L. Integrated Circuit or ‘chip’ Notch Pin 1
Best treated as a single component with required • input and output OUTPUT PROCESS INPUT 555 Timer • Description: • Contains 25 transistors, 2 diodes and 16 resistors • Maximum operating voltage 16V • Maximum output current 200mA If you input certain signals they will be processed / controlled in a certain manner and will produce a known output.
Inside the 555 Timer + Truth Table Vref Threshold Control Voltage R Q - Q S Trigger Discharge Fig: Functional Diagram of 555 Timer
Inside the 555 Timer Operation: • The voltage divider has three equal 5K resistors. It divides the input voltage (Vcc) into three equal parts. • The two comparators are op-amps that compare the voltages at their inputs and saturate depending upon which is greater. • The Threshold Comparator saturates when the voltage at the Threshold pin (pin 6) is greater than (2/3)Vcc. • The Trigger Comparator saturates when the voltage at the Trigger pin (pin 2) is less than (1/3)Vcc
Inside the 555 Timer • The flip-flop is a bi-stable device. It generates two values, a “high” value equal to Vcc and a “low” value equal to 0V. • When the Threshold comparator saturates, the flip flop is Reset (R) and it outputs a low signal at pin 3. • When the Trigger comparator saturates, the flip flop is Set (S) and it outputs a high signal at pin 3. • The transistor is being used as a switch, it connects pin 7 (discharge) to ground when it is closed. • When Q is low, Q bar is high. This closes the transistor switch and attaches pin 7 to ground. • When Q is high, Q bar is low. This open the switch and pin 7 is no longer grounded
Uses of 555 timer What the 555 timer is used for: • To switch on or off an output after a certain time delay i.e. • Games timer, Childs mobile, Exercise timer. • To continually switch on and off an output i.e. • warning lights, Bicycle indicators. • As a pulse generator i.e. • To provide a series of clock pulses for a counter.
555 Timer operating modes • The 555 has three operating modes: 1. Monostable Multivibrator 2.Astable Multivibrator 3. Bistable Multivibratior
555 Timer as Monostable Multivibrator • Description: • In the standby state, FF holds transistor Q1 ON, thus clamping the external timing capacitor C to ground. The output remains at ground potential. i.e. Low. • As the trigger passes through VCC/3, the FF is set, i.e. Q bar=0, then the transistor Q1 OFF and the short circuit across the timing capacitor C is released. As Q bar is low , output goes HIGH.
555 Timer as Monostable Multivibrator Fig (a): Timer in Monostable Operation with Functional Diagram Fig (b): Output wave Form of Monostable
Monostable Multivibrator- Description • Voltage across it rises exponentially through R towards Vcc with a time constant RC. • After Time Period T, the capacitor voltage is just greater than 2Vcc/3 and the upper comparator resets the FF, i.e. R=1, S=0. This makes Q bar =1, C rapidly to ground potential. • The voltage across the capacitor as given by, • If –ve going reset pulse terminal (pin 4) is applied, then transistor Q2-> OFF, Q1-> ON & the external timing capacitor C is immediately discharged. at
Behavior of the Monostable Multivibrator • The monostable multivibrator is constructed by adding an external capacitor and resistor to a 555 timer. • The circuit generates a single pulse of desired duration when it receives a trigger signal, hence it is also called a one-shot. • The time constant of the resistor-capacitor combination determines the length of the pulse.
Uses of the Monostable Multivibrator • Used to generate a clean pulse of the correct height and duration for a digital system • Used to turn circuits or external components on or off for a specific length of time. • Used to generate delays. • Can be cascaded to create a variety of sequential timing pulses. These pulses can allow you to time and sequence a number of related operations.
Monostable Multivibrator Problem: In the monostable multivibrator of fig, R=100kΩ and the time delay T=100ms. Calculate the value of C ? Solution: T=1.1RC
Applications in Monostable Mode • Missing Pulse Detector. • Linear Ramp Generator. • Frequency Divider. • Pulse Width Modulation.
1.Missing Pulse Detector Fig (a) : A missing Pulse Detector Monostable Circuit Fig (b) : Output of Missing Pulse Detector
Missing Pulse Detector- Description • When input trigger is Low, emitter-base diode of Q is forwarded biased capacitor is clamped to 0.7v(of diode), output of timer is HIGH width of T o/p of timer > trigger pulse width. • T=1.1RC select R & C such that T > trigger pulse. • Output will be high during successive coming of input trigger pulse. If one of the input trigger pulse missing trigger i/p is HIGH, Q is cut off, timer acts as normal monostable state. • It can be used for speed control and measurement.
2.Linear Ramp Generator at pin 2 > Vcc/3 Capacitor voltage at pin 6
Linear Ramp Generator- Description Analysis: Applying KVL around base-emitter loop of Q3 Q3 Ic i Voltage Capacitor, When becomes at T,
3.Frequency Divider Description: A continuously triggered monostable circuit when triggered by a square wave generator can be used as a frequency divider, if the timing interval is adjusted to be longer than the period of the triggering square wave input signal. The monostable multivibrator will be triggered by the first negative going edge of the square wave input but the output will remain HIGH(because of greater timing interval) for next negative going edge of the input square wave as shown fig. Fig: Diagram of Frequency Divider
4.Pulse Width Modulation Fig b: PWM Wave Forms Fig a: Pulse Width Modulation
Pulse Width Modulation- Description The charging time of capacitor is entirely depend upon 2Vcc/3. When capacitor voltage just reaches about 2Vcc/3 output of the timer is coming from HIGH to Low level. We can control this charging time of the capacitor by adding continuously varying signal at the pin-5 of the 555 timer which is denoted as control voltage point. Now each time the capacitor voltage is compared control voltage according to the o/p pulse width change. So o/p pulse width is changing according to the signal applied to control voltage point. So the output is pulse width modulated form.
Pulse Width Modulation Practical Representation Fig: PWM & Wave forms
Astable Multivibrator Fig (a): Diagram of Astable Multvibrator 1 – Ground 5 – FM Input (Tie to gnd via bypass cap) 2 – Trigger 6 – Threshold 3 – Output 7 – Discharge 4 – Reset (Set HIGH for normal operation) 8 – Voltage Supply (+5 to +15 V)
Astable Multivibrator R1 VA A1 A1 Vo V1 R2 V2 A2 A2 VC VT R3 Q1 Fig (b): Functional Diagram of Astable Multivibrator using 555 Timer
Astable Multivibrator- Description • Connect external timing capacitor between trigger point (pin 2) and Ground. • Split external timing resistor R into RA & RB, and connect their junction to discharge terminal (pin 7). • Remove trigger input, monostable is converted to Astable multivibrator. • This circuit has no stable state. The circuits changes its state alternately. Hence the operation is also called free running oscillator.
Astable 555 Timer Block Diagram Contents • Resistive voltage divider (equal resistors) sets threshold voltages for comparators V1 = VTH = 2/3 VCC V2 = VTL = 1/3 VCC • Two Voltage Comparators • For A1, if V+ > VTH then R =HIGH • For A2, if V- < VTL then S = HIGH • RS FF • If S = HIGH, then FF is SET, = LOW, Q1 OFF, VOUT = HIGH • If R = HIGH, then FF is RESET, = HIGH, Q1 ON, VOUT = LOW • Transistor Q1 is used as a Switch
Operation of a 555 Astable • Assume initially that the capacitor is discharged. • For A1, V+ = VC = 0V and for A2, V- = VC = 0V, so R=LOW, S=HIGH, = LOW , Q1 OFF, VOUT = VCC • Now as the capacitor charges through RA & RB, eventually VC > VTL so R=LOW & S=LOW. FF does not change state. RA RB VC(t) VCC
Operation of a 555 AstableContinued…… • Once VC VTH • R=HIGH, S=LOW, = HIGH ,Q1 ON, VOUT = 0 • Capacitor is now discharging through RB and Q1 to ground. • Meanwhile at FF, R=LOW & S=LOW since VC < VTH. RB VC(t) Q1
Operation of a 555 Astable Continued….. • Once VC < VTL • R=LOW, S=HIGH, = LOW , Q1 OFF, VOUT = VCC • Capacitor is now charging through RA & RB again. RA RB VC(t) VCC
Timing Diagram of a 555 Astable 1 2 3 VC(t) VTH VTL t VOUT(t) TL TH t t = 0 t = 0'
Astable Multivibrator- Analysis The capacitor voltage for a low pass RC circuit subjected to a step input of Vcc volts is given by, The time t1 taken by the circuit to change from 0 to 2Vcc/3 is, The time t2 to charge from 0 to vcc/3 is …… Charging time So the time to change from Vcc/3 to 2Vcc/3 is, So, for the given circuit, The output is low while the capacitor discharges from 2Vcc/3 to Vcc/3 and the voltage across the capacitor is given by, Contd….
Astable Multivibrator- Analysis After solving, we get, t=0.69RC …… Discharging time For the given circuit, Both RA and RB are in the charge path, but only RB is in the discharge path. The total time period, …….1.45 is Error Constant Frequency, Duty Cycle,
Behavior of the Astable Multivibrator • The astable multivibrator is simply an oscillator. The astable multivibrator generates a continuous stream of rectangular off-on pulses that switch between two voltage levels. • The frequency of the pulses and their duty cycle are dependent upon the RC network values. • The capacitor C charges through the series resistors RAand RB with a time constant (RA+ RB)C. • The capacitor discharges through RBwith a time constant of RBC
Uses of the Astable Multivibrator • Flashing LED’s • Pulse Width Modulation • Pulse Position Modulation • Periodic Timers • Uses include LEDs, pulse generation, logic clocks, security alarms and so on.
Applications in Astable Mode Square Generator FSK Generator Pulse Position Modulator
1.Square Generator 3 10µF Fig: Square Wave Generator C1 • To avoid excessive discharge current through Q1 when R1=0 connect a diode across R2, place a variable R in place of R1. • Charging path R1 & D; Discharging path R2 & pin 7.
2. FSK Generator • Description: • In digital data communication, binary code is transmitted by shifting a carrier frequency between two preset frequencies. This type of transmission is called Frequency Shift Keying (FSK) technique. Fig: FSK Generator Contd…..
FSK Generator • A 555 timer is astable mode can be used to generate FSK signal. • When input digital data is HIGH, T1is OFF & 555 timer works as normal astable multivibrator. The frequency of the output wave form given by, When input digital is LOW, Q1 is ON then R3 parallel R1
2. Pulse Position Modulator • Description: • The pulse position modulator can be constructed by applying a modulating signal to pin 5 of a 555 timer connected for astable operation. • The output pulse position varies with the modulating signal, since the threshold voltage and hence the time delay is varied. • The output waveform that the frequency is varying leading to pulse position modulation. Fig (a): Pulse position Modulator Fig (b): Output Wave Form of PPM
Astable Multivibrator Problem: In the astable multivibrator of fig, RA=2.2KΩ, RB=3.9K Ω and C=0.1µF. Determine the positive pulse width tH, negative pulse width tLow, and free-running frequency fo. Solution: Duty Cycle,
Example: Design a 555 Oscillator to produce an approximate square-wave at 40 KHz. Let C > 470 pF. One Possible Solution: F=40KHz; T=25µs; t1=t2=12.5µs For a square-wave RA<<RB; Let RA=1K and RB=10K t1=0.693(RB)(C); 12.5µs=0.693(10K)(C); C=1800pF T=0.693(RA+2RB)C: T=0.693(1K+20K)1800pF T=26.2µs; F=1/T; F=38KHz (almost square-wave). Example: A 555 oscillator can be combined with a J-K FF to produce a 50% duty-cycle signal. Modify the above circuit to achieve a 50% duty-cycle, 40 KHz signal. One Possible Solution: Reduce by half the 1800pF. This will create a T=13.1µs or F=76.35 KHz (almost square-wave). Now, take the output of the 555 Timer and connect it to the CLK input of a J-K FF wired in the toggle mode (J and K inputs connected to +5V). The result at the Q output of the J-K FF is a perfect 38.17 KHz square-wave.
Schmitt Trigger Fig (b): Output Wave Form Fig (a): Circuit Diagram of Schmitt Trigger The use of 555 timer as a Schmitt trigger is shown in fig. Here the two internal comparators are tied together and externally biased at Vcc/2 through R1 and R2. Since the upper comparator will trip at 2Vcc/3 and lower comparator at Vcc/3, the bias provided by R1 and R2 is centered within these two thresholds.
Features of IC 555 Timer The Features of IC 555 Timer are: 1. The 555 is a monolithic timer device which can be used to produce accurate and highly stable time delays or oscillation. It can be used to produce time delays ranging from few microseconds to several hours. 2. It has two basic operating modes: monostable and astable. 3. It is available in three packages: 8-pin metal can, 8-pin mini DIP or a 14-pin. A 14-pin package is IC 556 which consists of two 555 times.
Features of IC 555 Timer 4. The NE 555( signetics ) can operate with a supply voltage in the range of 4.5v to 18v and output currents of 200mA. 5. It has a very high temperature stability, as it is designed to operate in the temperature range of -55⁰c to 125oc. 6. Its output is compatible with TTL, CMOS and Op-Amp circuits.
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CC-MAIN-2021-21
| 14,099 | 45 |
https://www.ablemods.com/blog/2010/08/
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math
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Found an interesting problem with my AbleCommerce 7.0.3 installation after doing a test upgrade to 7.0.5 last night.
My add to cart button wouldn’t work after the upgrade. It kept saying Object reference blah blah blah. Put everything into the debugger and figured out I have some bad data in the storefront.
I had several (384 to be exact) ChildProductId’s assigned to real products in the ac_UpsellProducts table. Upsells are products that are advertised after the original product is added to the cart. Obviously you wouldn’t want to upsell a product that no longer exists – thus there’s a foreign key constraint on the ProductId. That way, any products that get deleted automatically delete their link in any upsell products and visa versa.
Somehow in my data, that wasn’t happening. I have products assigned as an upsell to a main product, and those products no longer exist. This was causing addtocartlink.ascx to throw a null reference exception when it hit the GetUpSellProducts method.
Easy fix is to just clean out any bad upsells using this query:
left outer join ac_products on ac_upsellproducts.childproductid = ac_products.productid
where ac_products.productid is null
You may have noticed by now that AbleCommerce 7 does not show all categories in the left side menu. Once you drill into a sub-category, the left side shows you only sub-categories from that point forward in the store catalog. AC7 makes it a tad confusing since now you don’t really know how to go back up unless you notice the breadcrumbs.
That’s swell if you have a sufficiently large catalog tree. Many stores do not have a large one. They would like to see all categories on every page that uses the Left Sidebar 1. This is incredibly simple to implement.
Edit your Left Sidebar 1 scriptlet. You can do this from either the Admin side or by switching to Edit Mode on the visitor side ( assuming you’re logged in as an admin).
the Left Sidebar 1 defaults to:
Just change it to:
Now save your change. You’ll see the results immediately – the category list control will always pull from the root level of the catalog to display all sub-categories at level 1. Suweet !!
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CC-MAIN-2019-43
| 2,187 | 13 |
https://guides.lib.uci.edu/c.php?g=1135425&p=8658453
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math
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Skip to Main Content
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Control Theory Tutorial by Open access book illustrating key concepts and forming a basis for a tutorial on control theory programming in Mathematica. Takes a unique concept-focused approach to show readers how to understand the principles of control. Complements classic texts by emphasizing the simple conceptual unity of control.
Coordinate Systems for Games by This monograph develops a method of creating convenient coordinate systems for game theory that will allow readers to more easily understand, analyze, and create games at various levels of complexity. By identifying the unique characterization of games that separates the individual’s strategic interests from the group’s collective behavior, the authors construct a single analytical methodology that readers will be able to apply to a wide variety of games.
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Metric in Measure Spaces by Measure and metric are two fundamental concepts in measuring the size of a mathematical object. Yet there has been no systematic investigation of this relation. The book closes this gap.
Semantic Computing by As the first volume of World Scientific Encyclopedia with Semantic Computing and Robotic Intelligence, this volume is designed to lay the foundation for the understanding of the Semantic Computing (SC), as a core concept to study Robotic Intelligence in the subsequent volumes.This volume aims to provide a reference to the development of Semantic Computing, in the terms of 'meaning', 'context', and 'intention'.
Solving Linear Partial Differential Equations: Spectra by Partial differential equations arise in many branches of science and vary in many ways. No one method can be used to solve all of them, and only a tiny percentage have been solved. In this book, we consider the general linear partial differential equation of arbitrary order m. Even this involves more methods that are known. We ask a simple question: when can an equation be solved and how many solutions does it have?
Topics in Cryptology - CT-RSA 2020 by This book constitutes the refereed proceedings of the Cryptographer's Track at the RSA Conference 2020, CT-RSA 2020, held in San Francisco, CA, USA, in February 2020.The 28 papers presented in this volume were carefully reviewed and selected from 95 submissions.CT-RSA is the track devoted to scientific papers on cryptography, public-key to symmetric-key cryptography and from crypto-graphic protocols to primitives and their implementation security.
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| 4,832 | 14 |
https://db0nus869y26v.cloudfront.net/en/Extravagant_number
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math
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In number theory, an extravagant number (also known as a wasteful number) is a natural number in a given number base that has fewer digits than the number of digits in its prime factorization in the given number base (including exponents). For example, in base 10, 4 = 2², 6 = 2×3, 8 = 2³, and 9 = 3² are extravagant numbers (sequence A046760 in the OEIS).
There are infinitely many extravagant numbers, no matter what base is used.
Let be a number base, and let be the number of digits in a natural number for base . A natural number has the integer factorisation
and is an extravagant number in base if
where is the p-adic valuation of .
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CC-MAIN-2022-33
| 643 | 5 |
https://www.quesba.com/questions/1-what-is-the-probability-that-the-number-x-of-successes-in-the-personnel-m-45768
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math
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1. What is the probability that the number
X of successes in the personnel manager’s sample of 100 employees in question
10 will be 48 or more?
2. Suppose that a batch of n ¼ 80 items is
taken from a manufacturing process that produces a fraction p ¼ .16 of
defectives. What is the probability that this batch
will contain between 19 and 20 defectives?
(Finding a defective is considered a success.)
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CC-MAIN-2021-43
| 403 | 8 |
http://demonstrations.wolfram.com/search.html?query=symbols:FindFit%20OR%20Fit%20OR%20FunctionInterpolation%20OR%20InterpolatingFunction%20OR%20InterpolatingPolynomial%20OR%20Interpolation%20OR%20LeastSquares%20OR%20ListInterpolation&start=41&limit=20
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math
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Search results for "
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s3://commoncrawl/crawl-data/CC-MAIN-2018-30/segments/1531676589022.38/warc/CC-MAIN-20180715222830-20180716002830-00132.warc.gz
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| 2,004 | 47 |
https://www.hackmath.net/en/math-problem/1123
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math
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Area of rhombus is 224. One diagonal measures 33, find length of other diagonal.
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There is given a circle K with a radius r = 8 cm. How large must a radius have a smaller concentric circle that divides the circle K into two parts with the same area?
- Land areas
Two land areas is 244 m2. The first parcel is 40 m2 less than twice of the second one. What have acreage of each parcel?
- Circular lawn
Around a circular lawn area is 2 m wide sidewalk. The outer edge of the sidewalk is curb whose width is 2 m. Curbstone and the inner side of the sidewalk together form a concentric circles. Calculate the area of the circular lawn and the result round to 1
- Holidays - on pool
Children's tickets to the swimming pool stands x € for an adult is € 2 more expensive. There was m children in the swimming pool and adults three times less. How many euros make treasurer for pool entry?
- Equations - simple
Solve system of linear equations: x-2y=6 3x+2y=4
- Fifth of the number
The fifth of the number is by 24 less than that number. What is the number?
- Hotel rooms
In the 45 rooms, there were 169 guests, some rooms were three-bedrooms and some five-bedrooms. How many rooms were?
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s3://commoncrawl/crawl-data/CC-MAIN-2019-43/segments/1570986666959.47/warc/CC-MAIN-20191016090425-20191016113925-00048.warc.gz
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CC-MAIN-2019-43
| 2,825 | 34 |
https://www.intechopen.com/profiles/176369
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math
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Three-dimensional (3-D) vibration analysis of thick functionally graded plates and cylindrical shells with arbitrary boundary conditions is presented in this chapter. The effective material properties of functionally graded structures vary continuously in the thickness direction according to the simple power-law distributions in terms of volume fraction of constituents and are estimated by Voigt’s rule of mixture. By using the artificial spring boundary technique, the general boundary conditions can be obtained by setting proper spring stiffness. All displacements of the functionally graded plates and shells are expanded in the form of the linear superposition of standard 3-D cosine series and several supplementary functions, which are introduced to remove potential discontinuity problems with the original displacements along the edge. The Rayleigh-Ritz procedure is used to yield the accurate solutions. The convergence, accuracy and reliability of the current formulation are verified by numerical examples and by comparing the current results with those in published literature. Furthermore, the influence of the geometrical parameters and elastic foundation on the frequencies of rectangular plates and cylindrical shells is investigated.
Part of the book: Advances in Functionally Graded Materials and Structures
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s3://commoncrawl/crawl-data/CC-MAIN-2024-18/segments/1712296818464.67/warc/CC-MAIN-20240423033153-20240423063153-00395.warc.gz
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CC-MAIN-2024-18
| 1,331 | 2 |
http://linear-motion84061.qowap.com/10345239/new-step-by-step-map-for-linear-motion
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math
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We welcome instructed improvements to any of our posts. You can make it less difficult for us to critique and, with any luck ,, publish your contribution by maintaining several factors in mind. Encyclopædia Britannica content are penned in a neutral objective tone for any normal viewers.
, is perpendicular to the motion. The ingredient in the drive parallel to your motion, or equivalently, perpendicular to the road connecting The purpose of software on the axis is F ⊥ displaystyle mathbf File _ perp
As outlined by Newton’s very first law (generally known as the basic principle of inertia), a physique without Web pressure acting on it's going to possibly continue to be at relaxation or carry on to maneuver with uniform speed in a very straight line, In accordance with its Preliminary ailment of motion.
Just one may Evaluate linear motion to typical motion. Usually motion, a particle's posture and velocity are explained by vectors, that have a magnitude and route. In linear motion, the Instructions of all the vectors describing the technique are equal and regular which suggests the objects shift alongside exactly the same axis and don't alter path.
As equipment screw actuators transform rotary motion into linear, they’re perfect for screw driving, wheels and axles, and vehicle jacks. An electric positioner is actually a linear motion method that maintains actuator stability and Command. Permit Grainger make the regulation of linear motion work for you.
calculated in radian. The displacement of an item can't be better than the space mainly because it is likewise a length but the shortest one particular.
So I'm going to include All those two vector, velocities alongside one another okay Therefore if I say and for that just one try to remember the gravitational velocity will probably be a adverse worth Whilst my Preliminary velocity up is going to be a beneficial worth. So let us go ahead and work out that their website velocity situations time is 20 meters per next times 2 seconds all right and minus gravity pointed down and yet again the space due to gravity is a person 50 % and ten moments 10 meters squared that is the drive of gravity instances time squared ok which happens to be 2 instances two.
A entire body in motion can be stated to obtain momentum equivalent to the item of its mass and its velocity. It also includes a form of Electrical power that may be fully as a result of its motion, known as kinetic Power. The kinetic Power of the entire body of mass m
Rather straightforward difficulty, if I see the twenty meters per next equals 10 meters for every 2nd instances t I am able to see that seconds squared site link and this will be device in seconds so that they'll terminate. I can see that my t equals 2 seconds alright.
Linear motion (also known as rectilinear motion) is actually a one dimensional motion along a straight line, and will thus be explained mathematically using only one spatial dimension. The linear motion may be of two kinds: uniform linear motion with regular velocity or zero acceleration; non uniform linear motion with variable velocity or non-zero acceleration.
Acceleration is outlined as the speed of alter of velocity with respect to time. Acceleration is the 2nd spinoff Recommended Reading of displacement i.
The equal of displacement in rotational motion could be the angular displacement θ displaystyle theta
These associations might be shown graphically. The gradient of a line over a displacement time graph signifies the velocity.
Our editors will assessment what you've submitted, and when it meets our conditions, we are going to include it to your short article.
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s3://commoncrawl/crawl-data/CC-MAIN-2019-04/segments/1547583671342.16/warc/CC-MAIN-20190119160425-20190119182425-00214.warc.gz
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CC-MAIN-2019-04
| 3,661 | 14 |
http://the-light.com/cal/venus.htm
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math
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I've uploaded a picture showing the apparent orbit of Venus as seen from the earth for a period of 8 years. I've also illustrated where both 13 and 5 come from. I've labeled the northernmost progression of each pass with a yellow number, southernmost with pink, westernmost with red. The center of the picture corresponds to the sun's position. The starting point is in January 2000 (located just above the pink 8).
In summary, in 8 years, Venus traverses the sky east-west 5 times and north-south 13 times.
The creation of this illustration was inspired by a discussion about whether 8:5 or 8:13 was the proper ratio between earth's and Venus' orbits. This illustration shows that they both apply.
To understand the image, imagine if you were to record the position of Venus in the sky once per day over a period of 8 years. Now connect the dots. The field of view is centered on the sun and includes enough area to include the entire orbit. The result is the illustration. Perhaps it would help if axes were labeled. I will consider this if I regenerate the image.
Of course Venus is generally visible when the sun is blocked by the earth, so when Venus is in the western sky, one half of the picture is below the horizon. When Venus is in the eastern sky, the other half of the picture is below the horizon.
I should have also mentioned that the color of the line alternates between green and blue with the months of the Gregorian calendar. Light shades correspond to Venus being on the near side of the sun. Dark shades correspond to the far side of the sun. Knowing this, you can see the effect of the parallax caused by earth's close position to Venus: the lines move much further when bright than when dim because that is when Venus is closer to Earth. After 8 years, the line comes very near its starting point just above the pink 8. If the line were continued for hundreds of years, you'd see a band gradually filling in as if you had a very close view of a wedding band.
Venus is currently rounding the bend at the point marked by the pink #5 (count months from the start of the line at each point the color alternates between blue/green). To compare the picture to the current sky, since Venus is up in the evening, rotate the picture clockwise by 90 degrees so the red numbers (West) are on top. This picture tells me that Venus is approaching its maximum progress to the south (left) and is also near its maximum height above the horizon (red #2). Also, the color has just switched from dark to light, so Venus is now getting closer to Earth and will very quickly (about 2 months) become a morning star again.
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s3://commoncrawl/crawl-data/CC-MAIN-2023-50/segments/1700679100135.11/warc/CC-MAIN-20231129173017-20231129203017-00024.warc.gz
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CC-MAIN-2023-50
| 2,622 | 7 |
https://wulixb.iphy.ac.cn/article/doi/10.7498/aps.55.628
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math
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Under the condition of small deformation, a new nonlinear wave equation is derived to describe nonlinear wave evolution in a nonlinear elastic circular rod by means of Hamilton principle. The nonlinear constitutive relationship proposed by Cox and transverse Possion effects are simultaneously taken into account. Nonlinear wave equation and truncated nonlinear wave equation are solved by the Jacobi elliptic cosine function expansion method. The exact periodic solutions of these nonlinear equations are obtained. The limiting conditions of these solutions are also given.
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s3://commoncrawl/crawl-data/CC-MAIN-2023-06/segments/1674764500303.56/warc/CC-MAIN-20230206015710-20230206045710-00843.warc.gz
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CC-MAIN-2023-06
| 574 | 1 |
https://engineering.stackexchange.com/questions/54645/does-a-disk-placed-in-a-pipe-perpendicular-to-flow-direction-of-fluid-feel-dynam
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math
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There are two discs in the pipe but not at the same time. You can consider conditions with X but without Y, then with Y and without X.
I am pretty sure that disc X will feel less force from fluid than disc Y does. I am looking for its reason.
Total pressures (static + dynamic) are the same for both conditions, because it's the same flow. In R1 area, dynamic pressure is low, but static is high. In R2 area, dynamic is high, but static is low, but in conclusion, total pressure is the same.
If total pressure is the same but force on X and Y is not the same, then how to justify this observation?
Does it mean that discs feel only dynamic pressure, not total? When I go for momentum equations, I find that disc Y must feel more force than X does since flow has higher velocity in R2 than in R1, which means higher momentum.
So, in this case, discs feel only dynamic pressure, I think.
What's your comment?
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s3://commoncrawl/crawl-data/CC-MAIN-2024-10/segments/1707947474784.33/warc/CC-MAIN-20240229035411-20240229065411-00635.warc.gz
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CC-MAIN-2024-10
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http://www.orangemane.com/BB/showthread.php?p=3783435&mode=threaded
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math
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|01-17-2013, 03:25 AM||#1|
Join Date: Sep 2005
Location: Bad Salzuflen, Germany
Does the game last saturday affect Champs place in broncos history?
I know there is the 100 post rule but i think this is an interesting question?
I know that everybody can have a bad game but i mean really:
You are a Hall of fame CB you have no ring and every shot can be your last. And you play a game like this?
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s3://commoncrawl/crawl-data/CC-MAIN-2014-49/segments/1416931006747.51/warc/CC-MAIN-20141125155646-00173-ip-10-235-23-156.ec2.internal.warc.gz
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http://www.mathgoespop.com/tag/voting/page/2
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math
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Many students often ask their teachers, “Why do I have to learn this boring mathematics? Nobody uses mathematics anyhow.” This new feature, entitled Math Gets Around, will attempt to show you that in fact, mathematics will pop up even in the least likely of places. So learn those multiplication tables, chief.
Today, we see how mathematics has weaseled its way into an unlikely place: the realm of politics. This is particularly relevant given the fact that, as some of you may have heard, there is a presidential election in just a few short months.
Among the general population, there will always be dissidents who complain of the failings of our democratic process. Among these dissidents, you may even find those who question the existence of our two party system, and claim that a system with a larger number of parties would be better for everyone involved. But I am here . . . → Read More: Math Gets Around: Politics
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s3://commoncrawl/crawl-data/CC-MAIN-2015-22/segments/1432207932182.89/warc/CC-MAIN-20150521113212-00241-ip-10-180-206-219.ec2.internal.warc.gz
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CC-MAIN-2015-22
| 930 | 3 |
https://10dollaressay.com/value-of-the-inventory/
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math
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Given:Company As demand is uniform throughout the year and totals 18,000 units per year. Ordering costs total $38 per order. The annual holding cost rate is 26% of the value of the inventory. The per-unit cost of inventory is $12.Company Bs demand is uniform throughout the year and totals 15,000 units per year. The production setup costs total $84 per setup. The annual holding cost rate is 28% of the value of the inventory. The per-unit cost of finished product is $19. The production rate is constant and equivalent to 60,000 units per year.Task:Write a brief response in which you:A. Determine the order size for Company A in the given scenario that would minimize total annual cost by using the economic order quantity model, showing all of your work.B. Determine the lot size for Company B in the given scenario that would minimize total annual cost by using the economic production lot size model, showing all of your work.
Value of the inventory
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What Students Are Saying
Outstanding service, thank you very much.
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s3://commoncrawl/crawl-data/CC-MAIN-2022-49/segments/1669446710916.40/warc/CC-MAIN-20221202183117-20221202213117-00831.warc.gz
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CC-MAIN-2022-49
| 1,249 | 10 |
http://slideplayer.com/slide/4640410/
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math
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12: Electromagnetic Induction 12.2 Alternating Current
Alternating Current Demo: HEP demo or dynamo Alternating Current and Voltage Whenever a magnet rotates near a coil or wire, its flux will move through the wire or coil inducing an alternating EMF across the coil or wire as a result of Faraday’s Law.
Rotating Coil in a Uniform Magnetic Field A very simple AC generator can consist of a single coil of copper wire being forced to rotate in a uniform magnetic field as shown. At the each end of the wire are connected circular ‘slip rings’. Q1. Explain the design and purpose of the ‘slip rings’ Q2. Why is the coil made from copper wire? Link: AC Generator AppletAC Generator Applet
This simplified diagram shows a coil ‘end-on’, rotating anti-clockwise: Q3. Explain using Faraday’s Law why the EMF will vary from maximum to zero as angle θ (between the normal to the coil and the field plane) goes from 90° to zero (as shown in the diagrams).
Q4. Plot points on the graph of flux linkage against time (for max positive flux linkage, max negative, zero) and draw the line that goes through them. Considering Faraday’s Law, similarly plot points on the graph of EMF against time and draw the line.
As can be seen from the two graphs, if EMF (ε) is a sinusoidal graph then flux linkage must give a cosine graph. In fact the equations for each are... N ϕ = BAN cosθ(or N ϕ = BAN cos ωt) ε = BAN ω sin θ(or ε = BAN ω sin ωt) (You do not need to know these equations however they should make sense to you).
Increasing the speed of rotation If the coil is rotated at a greater angular speed, the EMF generated will increase and the frequency of rotation will also increase. Hence the graph will change in two ways. Q5. The graph below shows the output of a coil rotating in a fixed uniform magnetic field. On the same axes, sketch the graph of i. a coil rotating with twice the frequency. ii. a coil rotating with half the frequency.
Root Mean Square Current In mathematics the Root Mean Square (rms) is a statistical method of determining the magnitude of a quantity that is varying. It can be thought of as a kind of ‘average’ value. In particular it is useful when dealing with sinusoidal variations (that can be positive or negative) such as induced EMF and current from a rotating coil. For discrete values of any quantity the following formula can be applied:
Clearly the calculated value is the square root of the mean of the squares of the discrete values. Q6. Determine the rms value of current from the following graph using eight successive discrete values: I (A)
For electrical output from a coil rotating at constant speed in a uniform magnetic field, the following formulae can be applied: ε rms = ε 0 √2 I rms = I 0 √2 Where... ε 0 = Maximum EMF (V) I 0 = Maximum current (A)
Power in AC circuits When calculating the power dissipated in an AC circuit, we use the rms values. Thus, for alternating current circuits... The rms value of an alternating current is identical to the value of direct current that would dissipate power at the same rate through a resistor. Power = I rms x V rms
Q7. Determine a formula for average power in an alternating circuit in terms of ε 0 and I 0. Q8. The rms voltage in Europe is about 230V. Determine the peak voltage value. What will be the rms current value through a 20W fluorescent light bulb?
Transformers If any two electrical circuits are near to each other, a changing current in one can cause an induced EMF in the other. A transformer uses changing flux linkage produced by one coil to induce an EMF in the second coil. Primary coil Secondary coil
The input current is a.c. Plot a graph of current in the primary (I p ) against time. The flux in the core is proportional to I p. Plot a graph of flux in the core against time. The EMF induced in the secondary is proportional to the rate of change of flux linkage. Plot a graph of Induced EMF in the secondary against time.
Transformer Calculations The flux passing through the primary and secondary coils is identical in a 100% efficient transformer. Q. Explain (using Faraday’s Law) why having more turns in the secondary than the primary can lead to the voltage being ‘stepped up’ (increased). The ratio of the turns is equal to the ratio of the voltages: V s N s V p N p =
Ideal Transformers A 100% efficient transformer is known as an ‘ideal transformer’. In this case all the power on the primary side is transferred to the secondary side. Thus... I p V p = I s V s (All values are rms values)
Q. If N p < N s, which of the following are true (re- write the wrong statements): a. ϕ p = ϕ s b. flux linkage is equal in both coils c. I p > I s d. V p > V s
Real Transformers In reality the output power is less than the input power. This could be due to: - Resistance of wires (causing heat transfer) - Eddy currents in core (causing heat transfer) - Flux leakage (not linking into the secondary coil) - Hysteresis (molecular friction) (causing heat transfer) Q. Suggest a way of decreasing each of the first three losses. (copper wires; laminated core; improved core design)
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CC-MAIN-2021-49
| 5,141 | 18 |
http://www.renovateyourworld.com/wwwboard/messages/nitwit_ii_using_vinyl_is_a_very_good_recommendation_30734.html
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math
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That is because the square tiles can be laid out such that the marriage line can be used as a point of reference for one edge of the squares that would run along it. Using any other type of non-square flooring may be asking for trouble. That is what Steve is saying. I think he understood the question quite well.
Do you have anything better to do with your time? How about actually helping someone!
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s3://commoncrawl/crawl-data/CC-MAIN-2017-04/segments/1484560279657.18/warc/CC-MAIN-20170116095119-00345-ip-10-171-10-70.ec2.internal.warc.gz
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CC-MAIN-2017-04
| 399 | 2 |
https://www.pedigreequery.com/sitemap.php?ZKI
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math
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Alphabetical List of Horses
There are more than one million horses in our database. To search through and find a horse by name, first click on the first letter of the horses name from the list below.A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y |Z
You clicked on the letter Z. Below you'll find a list of three letter combinations starting with
"Z". These correspond to the first three letters of horse names that exist in our database. Click on on of the letter
combinations to get a detailed list of horses.
ZUL | ZTU | ZUP | ZWI | ZGA | ZAD | ZIZ | ZYS | ZAG | ZBA | ZOP | ZIK | ZJE | ZAA | ZHO | ZOS | ZCR | ZUR | ZAO | ZEI | ZYZ | ZEU | ZRI | ZEK | ZAU | ZOG | ZUC | ZII | ZIS | ZRA | ZAV | ZUE | ZTA | ZAM | ZOC | ZLE | ZDR | ZIE | ZEV | ZYD | ZYG | ZSA | ZJI | ZEG | ZUB | ZZC | ZOZ | ZER | ZAH | ZIF | ZIP | ZIN | ZAP | ZZX | ZAR | ZSU | ZDO | ZJA | ZDE | ZAI | ZOJ | ZYH | ZRE | ZEB | ZYO | ZBU | ZAF | ZEM | ZUY | ZGH | ZUT | ZIW | ZEH | ZOX | ZZY | ZUG | ZIB | ZEW | ZUA | ZIY | ZOO | ZSI | ZUI | ZVE | ZUS | ZIG | ZAQ | ZEA | ZHW | ZLA | ZJU | ZEF | ZAY | ZID | ZIV | ZLO | ZEX | ZUQ | ZON | ZRM | ZVO | ZNA | ZUD | ZAX | ZOA | ZEP | ZUH | ZAN | ZHV | ZNI | ZEC | ZYX | ZAK | ZUV | ZOH | ZHE | ZOD | ZAT | ZZO | ZOK | ZMA | ZIT | ZAJ | ZOW | ZHU | ZWE | ZTR | ZWA | ZHI | ZEO | ZIM | ZEL | ZUW | ZIO | ZOI | ZCH | ZZZ | ZGO | ZWO | ZKI | ZES | ZBO | ZOV | ZMO | ZYP | ZYT | ZIU | ZIC | ZYN | ZYB | ZOE | ZOF | ZVI | ZIR | ZTI | ZAE | ZUM | ZAW | ZAS | ZOT | ZYM | ZYW | ZYA | ZYK | ZAB | ZEQ | ZAL | ZOB | ZEN | ZOR | ZCA | ZEJ | ZIH | ZUK | ZOQ | ZET | ZHA | ZLI | ZKU | ZIL | ZIA | ZOU | ZEE | ZOY | ZAC | ZUZ | ZUN | ZEY | ZEZ | ZZI | ZAZ | ZOM | ZYL | ZOL | ZUO | ZED | ZYC |
Here's the list of horses that start with the letters ZKI
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s3://commoncrawl/crawl-data/CC-MAIN-2019-39/segments/1568514572744.7/warc/CC-MAIN-20190916135948-20190916161948-00056.warc.gz
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CC-MAIN-2019-39
| 1,801 | 7 |
https://www.ams.org/journals/mcom/1981-37-156/S0025-5718-1981-0628707-8/home.html
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math
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Abstract:The paper presents the theoretical foundation of a forward error analysis of numerical algorithms under data perturbations, rounding error in arithmetic floating-point operations, and approximations in ’built-in’ functions. The error analysis is based on the linearization method that has been proposed by many authors in various forms. Fundamental tools of the forward error analysis are systems of linear absolute and relative a priori and a posteriori error equations and associated condition numbers constituting optimal bounds of possible accumulated or total errors. Derivations, representations, and properties of these condition numbers are studied in detail. The condition numbers enable simple general, quantitative definitions of numerical stability, backward analysis, well- and ill-conditioning of a problem and an algorithm. The well-known illustration of algorithms and their linear error equations by graphs is extended to a method of deriving condition numbers and associated bounds. For many algorithms the associated condition numbers can be determined analytically a priori and be computed numerically a posteriori. The theoretical results of the paper have been applied to a series of concrete algorithms, including Gaussian elimination, and have proved to be very effective means of both a priori and a posteriori error analysis.
I. Babuška, Numerical Stability in Numerical Analysis, Proc. IFIP-Congress 1968, Amsterdam, North-Holland, Amsterdam, 1969, pp. 11-23.
- Ivo Babuška, Numerical stability in problems of linear algebra, SIAM J. Numer. Anal. 9 (1972), 53–77. MR 386252, DOI 10.1137/0709008
- Ivo Babuška, Milan Práger, and Emil Vitásek, Numerical processes in differential equations, Státní Nakladatelství Technické Literatury (SNTL), Prague; Interscience Publishers John Wiley & Sons, London-New York-Sydney, 1966. In cooperation with R. Radok; Translated from the Czech by Milada Boruvková. MR 0223101
- F. L. Bauer, Genauigkeitsfragen bei der Lösung linearer Gleichungssysteme, Z. Angew. Math. Mech. 46 (1966), 409–421 (German). MR 208814, DOI 10.1002/zamm.19660460702
- F. L. Bauer, Computational graphs and rounding error, SIAM J. Numer. Anal. 11 (1974), 87–96. MR 356482, DOI 10.1137/0711010 F. L. Bauer et al., Moderne Rechenanlagen, Chap. 3, Teubner, Stuttgart, 1964.
- W. S. Brown, A realistic model of floating-point computation, Mathematical software, III (Proc. Sympos., Math. Res. Center, Univ. Wisconsin, Madison, Wis., 1977) Publ. Math. Res. Center, No. 39, Academic Press, New York, 1977, pp. 343–360. MR 0483616
- Peter Henrici, Elements of numerical analysis, John Wiley & Sons, Inc., New York-London-Sydney, 1964. MR 0166900
- John Larson and Ahmed Sameh, Efficient calculation of the effects of roundoff errors, ACM Trans. Math. Software 4 (1978), no. 3, 228–236. MR 506787, DOI 10.1145/355791.355794
- Seppo Linnainmaa, Taylor expansion of the accumulated rounding error, Nordisk Tidskr. Informationsbehandling (BIT) 16 (1976), no. 2, 146–160. MR 421065, DOI 10.1007/bf01931367 D. D. McCracken & W. S. Dorn, Numerical Methods and Fortran Programming, Wiley, New York, 1964.
- Webb Miller, Software for roundoff analysis, ACM Trans. Math. Software 1 (1975), 108–128. MR 405830, DOI 10.1145/355637.355639
- Webb Miller, Computer search for numerical instability, J. Assoc. Comput. Mach. 22 (1975), no. 4, 512–521. MR 478584, DOI 10.1145/321906.321916
- Webb Miller and David Spooner, Software for roundoff analysis. II, ACM Trans. Math. Software 4 (1978), no. 4, 369–387. MR 513705, DOI 10.1145/356502.356496
- John R. Rice, A theory of condition, SIAM J. Numer. Anal. 3 (1966), 287–310. MR 211576, DOI 10.1137/0703023 F. Stummel, Fehleranalyse numerischer Algorithmen, Lecture Notes, Univ. of Frankfurt, 1978.
- F. Stummel, Rounding errors in numerical solutions of two linear equations in two unknowns, Math. Methods Appl. Sci. 4 (1982), no. 4, 549–571. MR 681254, DOI 10.1002/mma.1670040135
- F. Stummel, Rounding error analysis of elementary numerical algorithms, Fundamentals of numerical computation (computer-oriented numerical analysis) (Proc. Conf., Tech. Univ. Berlin, Berlin, 1979) Comput. Suppl., vol. 2, Springer, Vienna, 1980, pp. 169–195. MR 586230 F. Stummel, "Rounding error anlaysis of difference and extrapolation schemes." (To appear.)
- Friedrich Stummel, Rounding error in Gaussian elimination of tridiagonal linear systems. Survey of results, Interval mathematics, 1980 (Freiburg, 1980) Academic Press, New York-London, 1980, pp. 223–245. MR 651366 F. Stummel, "Rounding error in Gaussian elimination of tridiagonal linear systems. I," SIAM J. Numer. Anal. (Submitted.) F. Stummel, "Rounding error in Gaussian elimination of tridiagonal linear systems. II," Linear Algebra Appl. (Submitted.) F. Stummel, "Forward error analysis of Gaussian elimination." (To appear.)
- Martti Tienari, On some topological properties of numerical algorithms, Nordisk Tidskr. Informationsbehandling (BIT) 12 (1972), 409–433. MR 334582, DOI 10.1007/bf01932311
- J. H. Wilkinson, Rounding errors in algebraic processes, Prentice-Hall, Inc., Englewood Cliffs, N.J., 1963. MR 0161456
- © Copyright 1981 American Mathematical Society
- Journal: Math. Comp. 37 (1981), 435-473
- MSC: Primary 65G99
- DOI: https://doi.org/10.1090/S0025-5718-1981-0628707-8
- MathSciNet review: 628707
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CC-MAIN-2023-06
| 5,384 | 24 |
http://www.cf.edu/jamieson/MAT_1033_bittinger/_index1033.htm
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math
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MAT 1033 Intermediate Algebra
Announcements: Bring scantrons to all tests
I have posted the Chap 6 Practice Test.
The Chapter 6 Test will be this Tuesday, 12/3.
For all my courses I will be using MyMathLab/CourseCompass.com as the main course management system.
TI30XS.pdf is a short manual of this calculator's features useful in College Algebra. I recommend it for all courses short of Pre-Cal, where you need a graphing calculator. If you have trouble finding it, the TI-34 Multiview and TI36X Pro are similar in price and more advanced in capability.
Mr. Roe has a manual for its use in Statistics.
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CC-MAIN-2014-49
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http://mathhelpforum.com/pre-calculus/14127-equation-straight-line-print.html
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math
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Equation of straight line!
Hey, i need some help with this question!
9(i) Find the gradient of the line l1 which has the equation 4x-3y+5=0.
I think its 4 by doing this:
y=mx+c where m is the gradient? Is that right?
(ii) Find an equation of the line l2 which passes through the point (1,2) and which is perpendicular to the line l1 giving your answer in the form ax+by+c=0
If someone could give a detailed solution for me, but as simple as possible i would be most grateful!
Thanks very much! :D
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CC-MAIN-2017-17
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https://math.stackexchange.com/questions/647177/how-often-should-math-students-take-day-breaks-and-longer-breaks-or-vacations-a
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math
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John Edensor Littlewood wrote in page 197 of Littlewood's Miscellany
"For a week without teaching duties - and here I think I am preaching to the converted - I believe in on afternoon and the following day off."
"At one time I used to work 7 days week (apart, of course, from 3-week chunks of holidays). I experimented during the Long Vacation with a Sunday off, and presently began to notice that ideas had a way of coming on Mondays."
What's the optimal frequency at which math students take complete days off math? How many days off? By "break" I mean at least a whole day away from math, and not just a break every hour. Is there any research on this?
What's the optimal frequency at which math should be paused for long breaks/vacations? Is there any research on this?
Is there any research on the subject of breaks/rest periods for math students? I'm very interested to hear what other mathematicians have done as students.
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https://en.wikipedia.org/wiki/Moderation_%28statistics%29
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math
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In statistics and regression analysis, moderation occurs when the relationship between two variables depends on a third variable. The third variable is referred to as the moderator variable or simply the moderator. The effect of a moderating variable is characterized statistically as an interaction; that is, a categorical (e.g., sex, ethnicity, class) or quantitative (e.g., level of reward) variable that affects the direction and/or strength of the relation between dependent and independent variables. Specifically within a correlational analysis framework, a moderator is a third variable that affects the zero-order correlation between two other variables, or the value of the slope of the dependent variable on the independent variable. In analysis of variance (ANOVA) terms, a basic moderator effect can be represented as an interaction between a focal independent variable and a factor that specifies the appropriate conditions for its operation.
- 1 Example
- 2 Multicollinearity in moderated regression
- 3 Post-hoc probing of interactions
- 4 See also
- 5 References
Moderation analysis in the behavioral sciences involves the use of linear multiple regression analysis or causal modelling. To quantify the effect of a moderating variable in multiple regression analyses, regressing random variable Y on X, an additional term is added to the model. This term is the interaction between X and the proposed moderating variable.
Thus, for a response Y and two variables x1 and moderating variable x2,:
In this case, the role of x2 as a moderating variable is accomplished by evaluating b3, the parameter estimate for the interaction term. See linear regression for discussion of statistical evaluation of parameter estimates in regression analyses.
Multicollinearity in moderated regression
In moderated regression analysis, a new interaction predictor () is calculated. However, the new interaction term will be correlated with the two main effects terms used to calculate it. This is the problem of multicollinearity in moderated regression. Multicollinearity tends to cause coefficients to be estimated with higher standard errors and hence greater uncertainty.
Mean-centering (subtracting raw scores from the mean) has been suggested as a remedy for multicollinearity. However, mean-centering is unnecessary in any regression analysis, as one uses a correlation matrix and the data are already centered after calculating correlations. Correlations are derived from the cross-product of two standard scores (Z-scores) or statistical moments (hence the name: Pearson Product-Moment Correlation). Also see the article by Kromrey & Foster-Johnson (1998) on "Mean-centering in Moderated Regression: Much Ado About Nothing".
Post-hoc probing of interactions
Like simple main effect analysis in ANOVA, in post-hoc probing of interactions in regression, we are examining the simple slope of one independent variable at the specific values of the other independent variable. Below is an example of probing two-way interactions. In what follows the regression equation with two variables A and B and an interaction term A*B,
will be considered.
Two categorical independent variables
If both of the independent variables are categorical variables, we can analyze the results of the regression for one independent variable at a specific level of the other independent variable. For example, suppose that both A and B are single dummy coded (0,1) variables, and that A represents ethnicity (0 = European Americans, 1 = East Asians) and B represents the condition in the study (0 = control, 1 = experimental). Then the interaction effect shows whether the effect of condition on the dependent variable Y is different for European Americans and East Asians and whether the effect of ethnic status is different for the two conditions. The coefficient of A shows the ethnicity effect on Y for the control condition, while the coefficient of B shows the effect of imposing the experimental condition for European American participants.
To probe if there is any significant difference between European Americans and East Asians in the experimental condition, we can simply run the analysis with the condition variable reverse-coded (0 = experimental, 1 = control), so that the coefficient for ethnicity represents the ethnicity effect on Y in the experimental condition. In a similar vein, if we want to see whether the treatment has an effect for East Asian participants, we can reverse code the ethnicity variable (0 = East Asians, 1 = European Americans).
One categorical and one continuous independent variable
If the first independent variable is a categorical variable (e.g. gender) and the second is a continuous variable (e.g. scores on the Satisfaction With Life Scale (SWLS)), then b1 represents the difference in the dependent variable between males and females when life satisfaction is zero. However, a zero score on the Satisfaction With Life Scale is meaningless as the range of the score is from 7 to 35. This is where centering comes in. If we subtract the mean of the SWLS score for the sample from each participant's score, the mean of the resulting centered SWLS score is zero. When the analysis is run again, b1 now represents the difference between males and females at the mean level of the SWLS score of the sample.
Cohen et al. (2003) recommended using the following to probe the simple effect of gender on the dependent variable (Y) at three levels of the continuous independent variable: high (one standard deviation above the mean), moderate (at the mean), and low (one standard deviation below the mean). If the scores of the continuous variable are not standardized, one can just calculate these three values by adding or subtracting one standard deviation of the original scores; if the scores of the continuous variable are standardized, one can calculate the three values as follows: high = the standardized score minus 1, moderate (mean = 0), low = the standardized score plus 1. Then one can explore the effects of gender on the dependent variable (Y) at high, moderate, and low levels of the SWLS score. As with two categorical independent variables, b2 represents the effect of the SWLS score on the dependent variable for females. By reverse coding the gender variable, one can get the effect of the SWLS score on the dependent variable for males.
Coding in moderated regression
When treating categorical variables such as ethnic groups and experimental treatments as independent variables in moderated regression, one needs to code the variables so that each code variable represents a specific setting of the categorical variable. There are three basic ways of coding: Dummy-variable coding, Effects coding, and Contrast coding. Below is an introduction to these coding systems.
Dummy coding is used when one has a reference group or one condition in particular (e.g. a control group in the experiment) that is to be compared to each of the other experimental groups. In this case, the intercept is the mean of the reference group, and each of the unstandardized regression coefficients is the difference in the dependent variable between one of the treatment groups and the mean of the reference group (or control group). This coding system is similar to ANOVA analysis, and is appropriate when researchers have a specific reference group and want to compare each of the other groups with it.
Effects coding is used when one does not have a particular comparison or control group and does not have any planned orthogonal contrasts. The intercept is the grand mean (the mean of all the conditions). The regression coefficient is the difference between the mean of one group and the mean of all the group means (e.g. the mean of group A minus the mean of all groups). This coding system is appropriate when the groups represent natural categories.
Contrast coding is used when one has a series of orthogonal contrasts or group comparisons that are to be investigated. In this case, the intercept is the unweighted mean of the individual group means. The unstandardized regression coefficient represents the difference between the unweighted mean of the means of one group (A) and the unweighted mean of another group (B), where A and B are two sets of groups in the contrast. This coding system is appropriate when researchers have an a priori hypothesis concerning the specific differences among the group means.
Two continuous independent variables
If both of the independent variables are continuous, it is helpful for interpretation to either center or standardize the independent variables, X and Z. (Centering involves subtracting the overall sample mean score from the original score; standardizing does the same followed by dividing by the overall sample standard deviation.) By centering or standardizing the independent variables, the coefficient of X or Z can be interpreted as the effect of that variable on Y at the mean level of the other independent variable.
To probe the interaction effect, it is often helpful to plot the effect of X on Y at low and high values of Z (some people prefer to also plot the effect at moderate values of Z, but this is not necessary). Often values of Z that are one standard deviation above and below the mean are chosen for this, but any sensible values can be used (and in some cases there are more meaningful values to choose). The plot is usually drawn by evaluating the values of Y for high and low values of both X and Z, and creating two lines to represent the effect of X on Y at the two values of Z. Sometimes this is supplemented by simple slope analysis, which determines whether the effect of X on Y is statistically significant at particular values of Z. Various internet-based tools exist to help researchers plot and interpret such two-way interactions.
The principles for two-way interactions apply when we want to explore three-way or higher-level interactions. For instance, if we have a three-way interaction between A, B, and C, the regression equation will be as follows:
Spurious higher-order effects
It is worth noting that the reliability of the higher-order terms depends on the reliability of the lower-order terms. For example, if the reliability for variable A is 0.70, and reliability for variable B is 0.80, then the reliability for the interaction variable A * B is 0.70 × 0.80 = 0.56. In this case, low reliability of the interaction term leads to low power; therefore, we may not be able to find the interaction effects between A and B that actually exist. The solution for this problem is to use highly reliable measures for each independent variable.
Another caveat for interpreting the interaction effects is that when variable A and variable B are highly correlated, then the A * B term will be highly correlated with the omitted variable A2; consequently what appears to be a significant moderation effect might actually be a significant nonlinear effect of A alone. If this is the case, it is worth testing a nonlinear regression model by adding nonlinear terms in individual variables into the moderated regression analysis to see if the interactions remain significant. If the interaction effect A*B is still significant, we will be more confident in saying that there is indeed a moderation effect; however, if the interaction effect is no longer significant after adding the nonlinear term, we will be less certain about the existence of a moderation effect and the nonlinear model will be preferred because it is more parsimonious.
- Cohen, Jacob; Cohen, Patricia; Leona S. Aiken; West, Stephen H. (2003). Applied multiple regression/correlation analysis for the behavioral sciences. Hillsdale, N.J: L. Erlbaum Associates. ISBN 0-8058-2223-2.
- Baron, R. M., & Kenny, D. A. (1986). "The moderator-mediator variable distinction in social psychological research: Conceptual, strategic, and statistical considerations", Journal of Personality and Social Psychology, 5 (6), 1173–1182 (page 1174)
- Taylor, Alan. "Testing and Interpreting Interactions in Regression-In a Nutshell" (PDF).
- Cohen Jacob; Cohen Patricia; West Stephen G.; Aiken Leona S. Applied multiple regression/correlation analysis for the behavioral sciences (3. ed.). Mahwah, NJ [u.a.]: Erlbaum. pp. 255–301. ISBN 0-8058-2223-2.
- Aiken L.S., West., S.G. (1996). Multiple regression testing and interpretation (1. paperback print. ed.). Newbury Park, Calif. [u.a.]: Sage Publications, Inc. ISBN 0-7619-0712-2.CS1 maint: Multiple names: authors list (link)
- Cohen Jacob; Cohen Patricia; West Stephen G.; Aiken Leona S. (2003). Applied multiple regression/correlation analysis for the behavioral sciences (3. ed.). Mahwah, NJ [u.a.]: Erlbaum. pp. 302–353. ISBN 0-8058-2223-2.
- Dawson, J. F. (2013). Moderation in management research: What, why, when and how. Journal of Business and Psychology. DOI: 10.1007/s10869-013-9308-7.
- Hayes, A. F., & Matthes, J. (2009). "Computational procedures for probing interactions in OLS and logistic regression: SPSS and SAS implementations." Behavior Research Methods, Vol. 41, pp. 924–936.
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CC-MAIN-2019-26
| 13,126 | 41 |
https://www.calculators.tech/article/how-can-we-calculate-significant-figures-during-math-class
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math
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When you are in your math class working with different mathematical values and operations, you often come across problems that require you to use significant numbers from the value.
The use of significant numbers is not new in mathematics. They have existed for a long time and are still of extreme importance in mathematics. If you are a student of mathematics, then you need to know how to calculate significant figures. Learning this is absolutely essential if you want to be accurate and precise with your mathematical calculations.
This is what we are going to talk about in this detailed guide. We are going to share with you everything that you need to know about Significant Digits and the best methods that you can use to calculate them during your math class.
What are Significant Figures?
Significant Numbers are the digits in a number that contribute to the precision and accuracy of that number. They are also regarded as the meaningful digits that convey the message that a value is supposed to convey.
Finding significant figures give you a result that you can use in the different mathematical calculation to produce consistent results with extreme accuracy.
Whether you are rounding numbers or you want to present a value in its scientific notation, you need to be able to determine the significant numbers in the value before you do anything else. Throughout the rest of this article, we are going to talk about the complete process that you can use for finding significant figures in math class.
How Can We Calculate Significant Figures During Math Class?
Scientists have developed a systematic approach for finding significant figures. This approach features a certain set of rules that anyone can use to find significant digits in a given value. Students are expected to learn and memorize these rules to make the significant digits identification easier and faster for them.
Rules for Calculating Significant Figures
Here is the complete set of rules that you need to follow when calculating significant figures in your math class.
When working with a value, all non-zero digits of the value would be significant.
When you are given a value that only has non-zero digits, then you need to consider all of them significant. This is because these are the values that have been calculated.
For example, in the term 0.9876, there are 4 significant digits. Similarly, the term 364.543 has 6 significant digits. This rule is true for all the values that don’t have zeros.
If the value that you are working with has one or more zeros between two non-zero digits, then those zeros will also be Significant.
Let’s take the help of an example to understand the concept a little bit better. If you have a number such as 0.679009, it has 6 significant digits. This is because the rule states that if zeros come in between 2 non-zero digits, then they are also significant. This rule is quite simple and eliminates the risk of considering zeros as insignificant digits all the time.
If you are working with a decimal point term and there are zeros on the right side of the decimal point that is not followed by a non-zero digit, then those zeros will be significant.
Consider the example of the number 72.00. This term has 4 significant digits when you look at it as per the terms defined in the rule. You can’t discard the zeros on the right side of the decimal point because they don’t have a non-zero digit after them.
This rule states that the zeros that are placed on the immediate right of a decimal point and the left of the non-zero digits are not significant.
The example of the number 0.0009876 explains this rule the best. Here, only the 4 numbers 9,8,7,6 are significant. The zeros are all insignificant as per the rule. You can look at it from the angle of writing the scientific notation for this number. You are going to discard the zeros for that and only work with the 4 digits mentioned above.
Hence, those digits are the only significant ones in this value.
Zeros that are placed on the right side of the last non-zero number in a decimal point value are significant.
Consider the number 0.00783400. This term has 6 significant digits as per the rule stated above. This rule is quite straightforward and should become clear with the example that we have given here.
There are various other rules for significant figures that you’ll find out there. But the ones mentioned here are all that matter as these are the ones that you will most likely come across.
Use the Sig Fig Calculator to Easily Calculate Significant Figures
When you are in your math class and you want to quickly find the significant digits in a value, you can use the SigFig Calculator for that.This calculator saves you from the hassle of using the rules to identify significant numbers.
The tool works on the same rules, so you don’t have to memorize them yourself. You can simply just add in the value that you want to work with, in this tool.After that, the tool processes the value to give you the exact number of significant digits in the value
So, when you are in your math class next time, utilize our free online Sig Fig calculator tool to quickly and accurately find out the number of significant figures in your input value.
The manual approach for significant figure calculation can often get confusing. This is because there are many rules that you need to memorize for accurately figuring out the significant figures in a value.
As much as we stress learning these rules, you can always use the Sig Fig calculator to make things simpler for yourself. So, go over the rules for calculating significant figures and also check out the Sig Fig calculator for finding significant figures in math class.
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s3://commoncrawl/crawl-data/CC-MAIN-2024-10/segments/1707947474440.42/warc/CC-MAIN-20240223153350-20240223183350-00857.warc.gz
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CC-MAIN-2024-10
| 5,719 | 30 |
https://www.bankersadda.com/quantitative-aptitude-quiz-for-ibps-rrb-po-clerk-prelims-2022-10th-august/
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math
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Directions (1-5): The following table shows total populations of five different cities, percent of graduate population and ratio between graduate male to graduate female in these five cities. Study the table carefully and answer the questions given below.
Note – Total population of each city = Graduate population + None graduate population
Q1. Total number of graduate females in city S is what percent of total number of graduate males in city Q?
Q2. Find the average number of graduate males in city Q and P?
Q3. Total number of graduate females in city R is how much more or less than total non-graduate population in City S?
Q4. Find the ratio of total number of graduate males in city S and Q together to total number of graduate females in city P and R together?
(c) 41: 40
(e) None of these
Q5. If total population of city S is increased by and other distributions remains same (as given in the table), then find the new difference between total number of graduate males and total number of graduate females in city S?
Directions (6-10): The table Shows the number of Mask, sanitizer and medicines sold in five different Cities. Study the following table carefully and answer the given questions given below.
Q7. Average number of masks sold in all the five cities is how much more or less than average number of sanitizers sold in all the five cities?
Q8. Find the ratio of total number medicines sold in cities B, C and D together to total number sanitizers sold in cities A, C and E together?
Q9. If in an another city F number of total articles sold is 40% more than total number of articles sold in city D and number of mask, sanitizer and medicine sold in city F are in the ratio of 10:13:11 respectively, then find total number of sanitizer sold in city F is how much more or less than that of in city B?
Q10. Total number of medicines sold in all the five cities together is how much more or less than the total number of sanitizers sold in all the five cities together?
Direction (11-15): The table given below shows the total number of graduates, percentage of unemployed graduates out of total graduates and respective ratio of male and female unemployed graduates in 5 states.
Q11. In which state male graduates who are unemployed are lowest?
(e) Uttar Pradesh
Q12. Find out the ratio between female unemployed graduate from Uttar Pradesh and male unemployed graduates from Haryana?
Q13. Find out the average number of female unemployed graduate from Haryana, Gujarat and Uttar Pradesh?
Q14. Number of female unemployed graduate from Bihar is what percent of male employed graduate from Maharashtra?
Q15. Total number of unemployed graduates in Gujarat is how much more than that of in Haryana?
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s3://commoncrawl/crawl-data/CC-MAIN-2022-40/segments/1664030335609.53/warc/CC-MAIN-20221001101652-20221001131652-00190.warc.gz
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CC-MAIN-2022-40
| 2,717 | 21 |
https://memim.com/karplus-equation.html
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math
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The Karplus relationship is an equation named after its discoverer, Martin Karplus and describes a correlation of the 3J coupling constant and the dihedral angle in the NMR spectroscopy.
Accordingly, the following equation applies:
Here, the coupling constant 3J, and the dihedral angle, and are empirical parameters which are determined by the substitution and functional groups of the constituent atoms. The relationship is used to obtain the magnitude of the 3JH, H coupling (also called vicinal coupling ) estimate. The coupling constant is close to 90 ° at very low torsion angles and at angles of 0 ° and 180 ° is significantly greater than normal. The relationship between the geometry and the coupling constant is valuable for determining and for calculating backbone conformations of proteins.
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s3://commoncrawl/crawl-data/CC-MAIN-2022-33/segments/1659882571232.43/warc/CC-MAIN-20220811012302-20220811042302-00259.warc.gz
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CC-MAIN-2022-33
| 805 | 3 |
https://optimization.community/article/MultiObjective_Optimization.html
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math
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Multi-Objective Optimization: Unlocking the Power of Optimization
Are you tired of making trade-offs between different objectives in your optimization problems? Do you want to find solutions that are not only optimal but also satisfy multiple criteria? If so, then multi-objective optimization (MOO) is the answer you've been looking for!
MOO is a powerful technique that allows you to optimize multiple objectives simultaneously, without having to compromise on any of them. It is a critical tool for decision-making in complex systems, where there are often multiple conflicting objectives that need to be balanced.
In this article, we will explore the basics of MOO, its applications, and some of the popular algorithms used to solve MOO problems. We will also discuss some of the challenges and limitations of MOO and how to overcome them.
What is Multi-Objective Optimization?
MOO is a branch of optimization that deals with problems that have multiple objectives. In traditional optimization problems, there is only one objective function that needs to be optimized. However, in MOO, there are two or more objective functions that need to be optimized simultaneously.
The goal of MOO is to find a set of solutions that are optimal with respect to all the objectives. These solutions are called Pareto optimal solutions, and they represent the best trade-offs between the different objectives.
Applications of Multi-Objective Optimization
MOO has a wide range of applications in various fields, including engineering, finance, logistics, and healthcare. Some of the common applications of MOO are:
- Portfolio optimization: In finance, MOO is used to optimize investment portfolios that have multiple objectives, such as maximizing returns while minimizing risk.
- Supply chain management: MOO is used to optimize supply chain networks that have multiple objectives, such as minimizing costs while maximizing customer satisfaction.
- Engineering design: MOO is used to optimize the design of complex systems that have multiple objectives, such as minimizing weight while maximizing strength.
- Healthcare: MOO is used to optimize treatment plans that have multiple objectives, such as minimizing side effects while maximizing effectiveness.
Popular Algorithms for Multi-Objective Optimization
There are several algorithms used to solve MOO problems, each with its strengths and weaknesses. Some of the popular algorithms are:
Non-Dominated Sorting Genetic Algorithm (NSGA-II)
NSGA-II is a popular algorithm for solving MOO problems. It uses a genetic algorithm approach to generate a set of Pareto optimal solutions. The algorithm works by first generating a population of solutions and then using a non-dominated sorting technique to rank the solutions based on their dominance. The algorithm then selects the best solutions from each rank to create the next generation of solutions.
Strength Pareto Evolutionary Algorithm (SPEA2)
SPEA2 is another popular algorithm for solving MOO problems. It uses a combination of fitness assignment and environmental selection to generate a set of Pareto optimal solutions. The algorithm works by first assigning a fitness value to each solution based on its dominance and then selecting the best solutions based on their fitness value.
Multi-Objective Particle Swarm Optimization (MOPSO)
MOPSO is a swarm intelligence-based algorithm for solving MOO problems. It uses a population of particles to search for Pareto optimal solutions. The algorithm works by first initializing a population of particles and then updating their positions and velocities based on their fitness values.
Challenges and Limitations of Multi-Objective Optimization
While MOO is a powerful technique, it also has some challenges and limitations that need to be addressed. Some of the common challenges and limitations of MOO are:
Curse of Dimensionality
MOO problems often have a large number of decision variables, which can make the search space very large. This can lead to the curse of dimensionality, where the number of solutions increases exponentially with the number of decision variables.
MOO problems are often computationally complex, which can make them difficult to solve. The algorithms used to solve MOO problems can be computationally intensive, which can lead to long runtimes and high memory usage.
Lack of Consensus
MOO problems often have multiple Pareto optimal solutions, which can make it difficult to choose the best solution. There is often a lack of consensus on which solution is the best, which can lead to decision-making challenges.
Multi-objective optimization is a powerful technique that allows you to optimize multiple objectives simultaneously. It has a wide range of applications in various fields and can help you make better decisions in complex systems. While MOO has some challenges and limitations, there are several algorithms available to solve MOO problems. With the right approach, MOO can unlock the power of optimization and help you achieve your goals.
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s3://commoncrawl/crawl-data/CC-MAIN-2023-50/segments/1700679100540.62/warc/CC-MAIN-20231205010358-20231205040358-00325.warc.gz
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CC-MAIN-2023-50
| 5,599 | 37 |
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=5221739
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math
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Skip to Main Content
This paper suggests using the family of exponential power (EP) distributions to model data which are believed (a priori) to be essentially symmetric but where the usual assumptions of s-normality is unwarranted. Four estimation procedures are proposed for the parameters of the distribution. Two procedures are based on variations of the method of maximum likelihood (ML) while the other two use the method of moments to estimate the shape parameter but employ ML to estimate the location and scale parameters of the model. A Monte Carlo analysis compares the mean square errors of the estimators of the location and scale parameters of the model. Sample sizes 4(4)28 were drawn 2000 times from five symmetric probability distributions. A minimax criterion was used to evaluate each of the estimators. Comparison with adaptive and nonadaptive estimates of location and scale parameters show that the new procedure provides: 1) good estimates of scale and location parameters, and 2) a complete probability model for the data.
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s3://commoncrawl/crawl-data/CC-MAIN-2015-18/segments/1429246642783.89/warc/CC-MAIN-20150417045722-00055-ip-10-235-10-82.ec2.internal.warc.gz
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CC-MAIN-2015-18
| 1,046 | 2 |
https://www.instructables.com/community/Need-help-how-can-I-design-solar-water-pump-syste/
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math
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Need help, how can I design solar water pump system? Answered
I was seeking your help if anyone can help me with my project because I am designing a solar pump water system given the following scenarios:
1. The minimum requirement is about 115,000 liters per day. I will have a storage tank that can contain 120000 liters.
2. The option to dig a 150 ft hole, or from a pond with a 50 ft far.
3. Considering that our location shines about 6 hours/day (bright sun).
Question is this:
1. If I would use DC pumps, with a flow rate of 5GPM what is the best size of solar panel?
2. If I would use AC pumps that requires 3 Hp with about 45 Gallons per minute what is the best size of solar panel?
3. Also what is the best type of connection Series or Parallel. I would use 100watt peak solar panel.
Guys help please thanks
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s3://commoncrawl/crawl-data/CC-MAIN-2021-17/segments/1618038065492.15/warc/CC-MAIN-20210411204008-20210411234008-00514.warc.gz
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CC-MAIN-2021-17
| 815 | 10 |
http://holidaymapq.com/best-family-vacation-usa/
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math
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Country Travel Economy
Uncalled capital, authorized capital issued to the public, but not called call) and not paid-up capital.
Uncertainty. One of a number of terms defined much more narrowly in economics than in everyday usage (others are investment, cost and profit). The classical definition of uncertainty, first given by f. h. knight, is that uncertainty exists when there is more than one possible outcome to a course of action, the form of each possible outcome is known, but the probability of getting any one outcome is not known. If the probabilities of obtaining certain outcomes are known, then this situation is one of risk. For example, suppose I make a bet with you that if I toss a coin, and it falls heads, I pay you £1, while if it falls tails, you pay me £1. To you, there are two possible outcomes of the decision to play this game: receiving £1 or paying £1. If the coin has not been tampered with in any way, we can say that the chances of its falling heads are fifty-fifty, i.e. there is a probability of 0-5 that it will be heads or tails. Since the probabilities of the outcomes are known, this is therefore a situation of risk. Suppose, however, that instead of tossing a coin I had made the bet contingent on whether or not the next motor car which passes us has an A or an E in its licence number. Since you are not likely to know the probabilities of these two events, the problem facing you is one of uncertainty. (c^> Bernoulli’s hypothesis.)
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s3://commoncrawl/crawl-data/CC-MAIN-2021-43/segments/1634323585270.40/warc/CC-MAIN-20211019140046-20211019170046-00268.warc.gz
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CC-MAIN-2021-43
| 1,733 | 8 |
http://sqhomeworktuzw.infra-sauny.info/fixed-costs-variable-costs-and-break-even.html
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math
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Fixed costs variable costs and break even
Study probes - chapter 7 problems how much will total variable costs be at break even 12 a firm will break even when revenues = variable costs – fixed costs. Start studying acct-1b chapters 3 and 4 a measure of the relative mix of a business's variable costs and fixed what is the break-even point if fixed costs. As the number of units sold increases, fixed costs stay fixed at $500, unit variable costs remain breakeven analysis: to break-even on costs. A critical part of cvp analysis is the point where total revenues equal total costs (both fixed and variable costs) at this break-even point, a. Explain fixed and variable costs and the concept of break even in relation to the organisation (a school. The contribution margin and fixed costs how fixed costs relate to the contribution margin fixed and variable costs the break-even point equation is fixed. Variable costs and fixed below is an example of a firm's cost schedule and a graph of the fixed and variable costs noticed that the fixed cost curve is flat.
What is a 'fixed cost' fixed costs and variable costs form the total it to achieve higher levels of revenues to break even fixed costs must be. The break-even point of a business is the level of output or sales at which the revenue received by the business is exactly equal to. Total variable costs $3400 fixed costs sales = variable cost + fixed cost + target operating profit 30,000 what is the break-even point. Variable, fixed and mixed (semi-variable) costs are classified as variable, fixed and mixed costs fixed and mixed (semi-variable) costs.
Break-even analysis and operating leverage recall that operating leverage describes the relationship between fixed and variable costs having high operating leverage (having a larger proportion of fixed costs compared to variable costs) can lead to much higher profits for a company. View test prep - hsm 260 week 6 checkpoint calculating fixed costs, variable cost from hsm 260 260 at university of phoenix what is the bep for the program since we see that they were in the red for. What is a break-even analysis by: the break-even analysis table calculates a break-even point based on fixed costs, variable costs per unit of sales. What is the variable cost per unit b if fixed cost are $650 what is the break-even number of units at fixed costs of $300,000 4) calculate break-even sales.
Fixed variable and break even points david anderson hsm/260 july 14, 2013 melvin green fixed variable and break even points fixed costs, variable costs, and break-even point. Cost-volume-profit analysis and administrative costs, be identified as variable or fixed using fixed costs of $300,000, the break‐even equation is. Determining the fixed and variable expenses is the first step in performing a break-even analysis the number of units needed to break even = fixed costs / (price. If fixed costs or variable costs or selling price of an item changes variable costs (vc) break-even break-even & cvp analysis author.
Assignment fixed costs, variable costs, and break-even point exercise 101 during the sixth month of the fiscal year, the program director of the. How do you calculate the break-even point in company's total amount of fixed costs plus its fixed expenses when we say variable expenses we mean the total of. Fixed and variable costs every business has fixed costs, which play roles in determining break-even points businesses also have variable costs, which make finding the actual break-even point more difficult.
Fixed costs variable costs and break even
Separate the expenses between fixed and variable costs per unit using this information and the sales price per unit of $8, compute the break-even point 5-3.
Fixed costs and variable costs can you explain how to solve for fixed costs, variable costs we can even figure what sales are required to just break even. How to calculate variable costs can be combined with fixed costs to carry out a break-even how do i calculate both fixed and variable cost while. The break-even point is the sales level at which total revenue generated is equal to the total cost (fixed and variable), meaning that at the break-even. Fixed cost, variable costs, and break-even point for the program 52,048 results, page 2 principles of finance some please help me the fixed cost for a firm drop by 25. (variable costs n + fixed costs) = 0 so, break-even point (n) variable costs) about break-even break-even analysis is a simple tool defining the lowest. Use this formula to learn how to calculate a breakeven point to help make decisions about fixed costs, variable costs and at a given price point to break even.
Break-even analysis break-even point = fixed costs/ (unit selling price – variable costs) since costs (fixed and variable. Chapter 10 revenue, costs and break-even analysis we must divide our costs into fixed and variable costs we can now draw the fixed costs line on the break-even. This breakeven analysis definition explains how to use fixed costs and variable costs (overhead) to find the best price for your products or services. 1 fixed cost is the difference between total cost and total variable cost true question 2 in general, an increase in price increases the break even point if all costs.
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CC-MAIN-2018-43
| 5,279 | 10 |
https://www.oreilly.com/library/view/23rd-european-symposium/9780444632340/xhtml/CHP163.html
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math
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Taylor Models in Deterministic Global Optimization for Large-Scale Systems with Few Degrees of Freedom
Jai Rajyaguru and Benoît Chachuat, Centre for Process Systems Engineering, Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
Many process systems applications comprise large sets of nonlinear model equations, whose participating variables can be split naturally into independent and dependent variable subsets. This structure can be exploited for deterministic global optimization based on a sequential approach, which performs the optimization in the reduced space of independent variables by considering the model as implicit equations. This paper presents a new method for constructing ...
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s3://commoncrawl/crawl-data/CC-MAIN-2023-40/segments/1695233510259.52/warc/CC-MAIN-20230927035329-20230927065329-00627.warc.gz
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CC-MAIN-2023-40
| 752 | 3 |
https://www.projecteuclid.org/journals/rocky-mountain-journal-of-mathematics/volume-50/issue-2/On-the-socle-of-a-commutative-ring-and-Zariski-topology/10.1216/rmj.2020.50.707.short
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math
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This paper concerns the coincidence of the socle of a semiprimitive ring (or just a reduced one, in some cases) with the intersection of all essential prime, essential minimal prime, or essential maximal ideals of the ring. More precisely, we prove first that the socle of a reduced ring coincides with the intersection of all essential minimal prime ideals if and only if every minimal prime (or, equivalently, every prime) ideal is either essential or it is a direct summand which is also a maximal ideal. Next, we show that the socle of a semiprimitive ring is equal to the intersection of all essential maximal ideals of (i.e., ) if and only if the set of isolated points of with the Zariski topology contains no infinite basic open set. Whenever is a semiprimitive c.a.c. ring, we prove that for every essential ideal of containing , is essential in if and only if the set of isolated points of is finite. We apply this result to rings of continuous real-valued functions on a topological space.
"On the socle of a commutative ring and Zariski topology." Rocky Mountain J. Math. 50 (2) 707 - 717, April 2020. https://doi.org/10.1216/rmj.2020.50.707
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CC-MAIN-2024-18
| 1,153 | 2 |
http://sergedebeketch.tk/lolem/writing-geometric-series-in-sigma-notation-673.php
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math
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Socratic Meta Questions Topics ×. How do you use sigma notation to write the sum for #3-9+27-81+243. How do you find the sum of the infinite geometric series #.
Evaluating the sum of a partial geometric sequence using
Arithmetic Series; Finite Geometric Series;. Sigma Notation Exercises. BACK;. Use sigma notation to write the series. starting at (a).Answer to Rewrite the following series in summation notation in #s 11 & 12. Evaluate each series using sum formulas. Expand each.A video explanation of series and summation. A series is a sum of the terms of a sequence. The video includes of the notation that represents series and summation.Writing a Geometric Series using Sigma / Summation Notation. This video shows how to write the infinite geometric series: 1 + 0.1 + 0.01 + 0.001.1 Mar 195:49 PM 9.5 Series Name: _____ Objectives: Students will be able to use sigma notation and find finite sums of terms in arithmetic and geometric.
A simple method for indicating the sum of a finite (ending) number of terms in a sequence is the summation notation. This involves the Greek letter sigma, &Sigm.Write the series in sigma notation. 1/4 + 1/2+ 3/4. use sigma notation to write the maclaurin series for the. ( Consider the infinite geometric series x e.Finite Geometric Series;. This series is short, but writing down all the terms of a series is only. a finite series written in sigma notation will have.
Properties of the sigma notation. What is an arithmetic series?. SIGMA NOTATION FOR SUMS. Three theorems. The sum of consecutive. The first time we write it,.Evaluating the sum of a partial geometric sequence using Sigma notation. Partial sum of a geometric series. 0. Write Moby Dick,.Sigma notation mc-TY-sigma-2009-1 Sigma notation is a method used to write out a long sum in a concise way. In this unit we look at ways of using sigma notation, and.Series, Sigma and Arithmetic Sequences and Series. I. Return Quiz 3. Sigma Notation. Write The class will try.
Find the sum of a geometric series Use sigma notation to write a series Part l: Practice Tell whether each sequence is geometric. If so, give the common ratio and the.Summation / Sigma Notation Calculator. Online numbers calculator which calculates the result of any mathematical expression, from the given expression, start and end.
Mr. White's PreCalculus Honors. Search this. Given the terms of an arithmetic or geometric sequence, write an explicit or. Write a series in sigma notation.
Summation / Sigma Notation Calculator - Easycalculation.com
First, let's check out the sigma notation for geometric sequences: Here's an example:. Series and Sigma Notation. Some Sigma Notation. Arithmetic Sequences.Algebra > Sequences and Series > Series and Sigma Notation. Page 1 of 6. Series and Sigma Notation. OK, so we know what a sequence is. Geometric Series.Answer to write the geometric series 2+\+ using the Sigma Notation Σ-arn-1) then find its sum. + (8 pts) 2 8 32 n-1.Calculus I Summation Notation. Writing a Geometric Series Using Sigma Notation / Summation - Explained with Examples. by The WeSolveThem Team | Published 08/06/2017.Write the sum in sigma notation,. The population of a local species of mosquitos can be found using an infinite geometric series where a1 = 740 and the common.
Explains the basic terminology and notation of sequences and series, including summation symbols, subscripts, and indices.
Series, Sigma notation, finite & Infinite series, ByA geometric series is a series whose related sequence is geometric. It results from adding the terms of a geometric sequence. Written in sigma notation:.Final Thoughts on Sigma Notation; Infinite Series. A Geometric Series Problem with Shifting. One Response to A Geometric Series Problem with Shifting Indicies.T1.1 –Lesson 3 -Arithmetic & Geometric Series & Summation Notation. letter sigma, Σis used to. Examples of Summation Notation 8Write out the series.
Writing a Series in Summation Notation - VidInfo
Sigma notation - Mathematics resourcesincluding writing the first n terms,. Teach the basics of arithmetic and geometric sequences and series,. fully understand the formulas and sigma notation.The symbol is the capital Greek letter sigma. 2.The key to writing these sums with summation notation is to nd. 1This is indeed a geometric sequence with.
Summation Notation - Mr. RexhepiWriting a Geometric Series using Sigma / Summation Notation, Ex 2. This video shows how to write an Infinite geometric series.using sigma / summation notation. I do.
T1.1 –Lesson 3 -Arithmetic & Geometric Series - Tripod.com
Write the following series in sigma notation: Consider the series and determine if it is an arithmetic or geometric series. First test for an arithmetic series:.Warm-up Sigma Notation Geometric Series. Sigma Notation and Geometric. The partial sums are presented in sigma notation and I ask that students first write.
Finite arithmetic series. Current time:. So given what I just told you, I encourage you to pause this video and write the Sigma notation for this sum right over here.
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CC-MAIN-2019-13
| 5,254 | 18 |
https://softadvice.informer.com/Mathematica_5.1_Full.html
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math
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Users interested in Mathematica 5.1 full generally download:
For three decades, Mathematica has defined the state of the art in technical computing—and provided the principal computation environment for millions of...
For less than the price of a textbook you can utilize the same technology on your personal computer as engineers, economists, scientists, mathematicians, and educators worldwide/ Mathematica for...
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It is a full featured and mathematically accurate Tonoscope emulator.
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s3://commoncrawl/crawl-data/CC-MAIN-2017-47/segments/1510934804610.37/warc/CC-MAIN-20171118040756-20171118060756-00734.warc.gz
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CC-MAIN-2017-47
| 2,015 | 31 |
https://bonpapers.com/bon/multiple-choice-questions1-the-total-cost-tc-of/
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math
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10 Nov Multiple Choice Questions1. The total cost (TC) of
Multiple Choice Questions1. The total cost (TC) of an item is calculated as TC = F + VX, where X is the A. estimated volume of production.B. total variable cost.C. variable cost per unit of activity.D. actual volume of production.2. The cost structure of an organization refers to which of the following?A. proportion of fixed and variable costs to total costs.B. proportion of total revenue to total costs.C. proportion of profits to total costs.D. None of the answers is correct.Calculation Questions1. Catfish Company produces two products, C and F, with the following characteristics: Product C Product F Selling price per unit $10 $15 Variable cost per unit $7 $10 Expected sales (units) 10,000 5,000Total fixed costs for the company are $21,000.REQUIRED (show your work):A. What is the anticipated profit given the expected sales volume?B. Assuming the product mix would be the same at the break-even point, compute the break-even point (be sure to indicate the number of units of each product).C. If only product C were sold, how many units would be needed to break even?D. If only product F were sold, how many units would be needed to break even?E. If the product mix changed so that equal units of C and F were sold, what would be the new break-even point in total units?2. Potomac Corporation wishes to earn a 25% return on its $100,000 investment in equipment used to produce product M. Based on estimated sales of 10,000 units of product M, the cost per unit would be as follows: Variable manufacturing costs $5 Fixed selling and administrative costs $2 Fixed manufacturing costs $1At how much per unit should Pro
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s3://commoncrawl/crawl-data/CC-MAIN-2020-50/segments/1606141750841.83/warc/CC-MAIN-20201205211729-20201206001729-00685.warc.gz
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CC-MAIN-2020-50
| 2,270 | 6 |
https://math.answers.com/Q/What_has_a_greater_weight_oz_or_pound
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math
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4 pound is.
Since there are 16 oz. in one pound, 8 oz. = 1/2 pound. Therefore, 1/2 pound is greater than one fourth pound.
No, a lb is much greater than an oz.
A pound is 16 times greater than an ounce.
16 oz. to the pound
there are 16 oz by weight in a pound
1 pound weight = 16 Ounce weight. Therefore 12 oz = 3/4 pound (0.75)
assuming 12 pound should be 1/2 pound then both the same 8 oz = 1/2 pound
anything that has a weight greater than 1lb in which case 1lb 0.00000001 oz is heavier than 1lb
1.2 pound-weight or 0.167 Newtons.
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s3://commoncrawl/crawl-data/CC-MAIN-2022-40/segments/1664030335054.79/warc/CC-MAIN-20220927162620-20220927192620-00197.warc.gz
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CC-MAIN-2022-40
| 533 | 10 |
https://greenedtech.com/school-level-program/o-level/
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math
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The course aims to strengthen mathematical skills, deepen mathematical knowledge, improve problem-solving, integrate IT, build confidence, foster creativity, and provide a foundation for further study in mathematics.
The objective of this Advanced Mathematics (Add Maths) course is to develop students’ advanced mathematical skills, problem-solving abilities, and appreciation for the subject. The course aims to prepare students for further studies in mathematics or mathematics-related subjects.
- Quadratic functions
- Equations, inequalities, and graphs
- Indices and surds
- Simultaneous equations
- Logarithmic and exponential functions
- Straight line graphs
- Circular measure
- Permutations and combinations
- Vectors in two dimensions
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| 746 | 11 |
https://sixsigmadsi.com/standard-deviation-measure-of-dispersion/
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math
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Using “Standard Deviation” as a Measure of Data Spread or Dispersion
A measure of dispersion in a Cumulative probability of a normal distribution with expecte... units chart tells you the sign spread of the data. It is important to know the standard deviation rule spread of your data when describing your data set. Most describe a set of data by using only the mean or median leaving out a description of the spread.
There are two main measures of spread or dispersion:
In this article we will discuss the Standard Deviation of the Used for determining the confidence interval for means or fo...
The standard deviation(s) is the most common measure of dispersion. Standard deviation tells you how spread out or dispersed the data is in the data set. It is a measure of how far each observed value in the data set is from the mean. In any distribution, theoretically 99.73% of values will be within +-3 standard deviations of the mean.
Why is Standard Deviation Rule Important in Lean Six Sigma?
Let’s look at an example. Let’s say I owned a company that produced widgets as a sub-component for other parts. Every time a widget is produced, a system records the time it took from start to finish of the widget. The requirements for the time to complete a widget is no less than 6 minutes and no more than 18 minutes.
In the below example, we calculate the standard deviation as 1.5 minutes from a sample of 60 widgets.
What happens if the standard deviation increases? Let’s see:
These illustrations show that knowing the standard deviation and tolerance of a process can show the performance of the process. Knowing the performance of a process is critical in a Lean Six Sigma project.
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| 1,696 | 10 |
https://math.stackexchange.com/questions/384437/simple-fractions-question
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math
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Mary and Henry shared a collection of stamps. Mary had 7/10 of the total number of stamps. If Mary gave 38 stamps to Henry, she will have thrice the number of stamps Henry have. How many stamps did Mary have?
By the way, we cannot use algebra to solve this question.
This is the entire question, because this is a primary school(5th Grade) question in Singapore, we can't use algebra to solve since they haven't learnt it.
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s3://commoncrawl/crawl-data/CC-MAIN-2019-26/segments/1560628000266.39/warc/CC-MAIN-20190626094111-20190626120111-00160.warc.gz
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CC-MAIN-2019-26
| 422 | 3 |
http://www.lossofgenerality.org/category/uncategorized/
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math
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Here is where all the new educational Modules (non-commercial) go: http://modules.lossofgenerality.com/ See some sample screenshots:
By Alexander IIin According to the Principle of Mach inert properties of the physical body are determined by all the physical bodies in the universe, which means that among all the bodies in the universe there is an instant and continuous exchange of information about their condition and body influence each other’s instant action. […]
Experiment on solving the constant R-matrices for Grassmann Algebra with 2-4 generators: http://files.lossofgenerality.com/YBE_Grassmann.pdf Source: http://files.lossofgenerality.com/YBE_Grassmann.nb Also computed the solutions modulus 5: All solutions obtained symbolically and numerically using Mathematica 9.0 . No pencil and paper computations.
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s3://commoncrawl/crawl-data/CC-MAIN-2017-22/segments/1495463608765.79/warc/CC-MAIN-20170527021224-20170527041224-00061.warc.gz
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CC-MAIN-2017-22
| 822 | 3 |
https://ip-numaram.com/solve-147
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math
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Solve the rational equation calculator
In this blog post, we will show you how to Solve the rational equation calculator. Our website will give you answers to homework.
Solving the rational equation calculator
There are also many YouTube videos that can show you how to Solve the rational equation calculator. Pay attention to the connection between mathematics and real life, and through a variety of methods, highlight the cultivation of students' ability to understand and analyze, operate and explore, express, and flexibly apply knowledge to solve problems, so as to develop students' mathematical literacy. This test paper is based on the mathematics curriculum standards and the current teaching materials, focusing on the key points of knowledge learned in the first half of the four volumes: Division of the remainder, recognition of numbers, decimeters and millimeters, addition, recognition of directions, and a small part of the content of the previous semester. The examination paper is examined by questions such as directly write the number, fill in the blanks, measure the quantity, draw a picture, and solve the problem by vertical calculation and by means of combination of pictures and text. The overall structure of the examination paper is reasonable, close to the presentation mode of the textbook, and the level is clear. The examination paper attaches importance to the examination of students' mastery of the core concepts of mathematics, the establishment of the sense of numbers, symbols, space, and the application consciousness and reasoning ability.
I also hope that all candidates can achieve good results in the elevator repair operation examination. The most important reason why a child can complete his homework in time, have good learning habits and self-discipline is that he has internal drive. What is this internal driving force? I think the answer is very obvious. After downloading the app, you can choose the courses you need to learn. Khan college will set up a personal dashboard (including explanations of correct and wrong answers) containing teaching videos, practice exercises and tests, so you can learn at your own pace.
Fetti Pardi (the record holder of the youngest driver championship in F1), senna, Hakkinen and Coulthard are all drivers from Formula Ford. At present, the influence of Formula Ford with 4 cylinders, displacement of 1.8 liters and 145 horsepower in the United States has declined, but it is still very popular in Europe. Formula three (F3) is a high-cost and high-tech single seat four-wheel racing competition, which is second only to formula one and GP2. Formula 3 racing is organized by the International Automobile Association (FIA).
I personally feel that this method of deep learning is more suitable for solving scenarios where people are difficult to model with mathematical and physical equations and do not have high accuracy requirements, so it has a taste of compromise. Many scenarios in the real physical world have been abstracted into groups of equations and many laws. Solving equations directly is the most convenient way to get satisfactory answers. Second: the knowledge of higher numbers used in Electrotechnics is derivative, differential, integral, and differential equation.
Zhang x et al. Introduced the above methods into structural reliability analysis, combined with dimension reduction processing to achieve fractional moment estimation of functional functions, and further improved the method of solving probability density functions using the maximum entropy principle under the constraint of fractional moment. Monte Carlo method, also known as statistical simulation method and random sampling technology, is a random simulation method, a calculation method based on probability and statistical theory, and a method to solve many calculation problems using random numbers (or pseudo-random numbers). The problem to be solved is associated with a certain probability model, and statistical simulation or sampling is implemented by an electronic computer to obtain an approximate solution of the problem.
We solve all types of math problems
IT DOES FRACTIONS!!!! I'm a plumber and to be able to write a bunch of numbers and do the math quickly is amazing!!! you can’t write it diagonally the. you have to put say 1 on top draw a flat line and put 4 on bottom. if they made a fractions mode into the calc where it did everything in imperial unit’s this app would be #1 for tradesmen.
Great, amazing, wonderful. Doesn't always have the answers I'm looking for but this app is the solution to all your math struggles. This app is super easy and gives you a tutorial beforehand. I have been using this app for all three years of high school so far and it comes in clutch more than often.
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CC-MAIN-2023-06
| 4,790 | 11 |
http://webgenchem.com/gc2600006.htm
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math
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In this section you will learn about another method of quantifying the difference in strength of acids and bases. You will learn about pH, pOH, and how to calculate them.
For a Bronsted-Lowry acid or base, we know that the larger the value of the concentration of H3O+ or OH-, the stronger the acid or base, respectively. So if we can then devise a measure of stating the concentration of either then we will have a convenient quantitative method to state the strength of an acid or base. Since we will be working in water solutions, let's examine the water equilibrium in some detail by first writing the water-water reaction:
H2O(l) + H2O(l) --> H3O+(aq) + OH-(aq)
We can write the equilibrium constant for this reaction as
K = [H3O+][OH-]/[H2O]2 or K[H2O]2 = [H3O+[OH-]
But remember that we usually don't include the concentration of water in the equilibrium expression. Its concentration does not change appreciably and is very large for dilute solutions. So we will combine its constant concentration with K to give a new equilibrium constant, Kw. Thus,
Kw = [H3O+][OH-]
Because there are no other sources of protons in pure water, we know that [H3O]+ must equal [OH-].
Electrical conductivity measurements tell us that, at 25 oC, they are both equal to 1.0 x 10-7 so Kw = 1.0 x 10-14. [Remember that equilibrium constants are a function of temperature so Kw changes with temperature.]
We can now say that
When we add an acid or base to this water equilibrium, we will upset the equilibrium condition. However remember LeChatelier's principle tells us that the reaction will shift to oppose the perturbation and will reestablish equilibrium.
Let's consider that we have a 0.0010 solution of NaOH and we want to know the concentration of the hydronium ion and the hydroxide ion. Consider that the ionization of water does not occur until after the addition of the NaOH so that we have initially [H3O+] = 0, and [OH-] = 0.0010. There will be shift in the reaction to reestablish equilibrium. Since the stoichiometric coefficients of the products are equal, the shift in the amounts of [H3O+] and [OH-] will be equal; let's call that shift x. After equilibrium is established we will have x M concentration of H3O+ and (0.0010+x) M concentration of OH-. Now the equilibrium constant expression will be
Kw = 1.0 x10-14 = x (0.0010+ x) = 0.0010 x + x2
We could use the quadratic equation to easily solve for x, but we can also note that x will be very small. This means 0.0010 + x is approximately equal to 0.0010. So we now have that 1.0 x 10-14 = 0.0010x or x = 1.0 x 10-11 M for the concentration of H3O+, and the concentration of OH- will be 0.0010 + 1.0 x 10-11 which is 0.001 or 1.0 x 10-3. Note that the product of concentrations is still Kw as it must be.
We know that the strength of the conjugate base of a strong acid is weak, so we know that Kb for this base will be less than Ka for the acid. It is easy to show that the product of the Ka of an acid and the Kb of the corresponding base is equal to Kw (page 806 in your text). So we have the very useful expression
Kw = KaKb
If we know either Ka or Kb we can easily use this equation to calculate the unknown.
It would be cumbersome to continually write all H+ concentrations in exponential notation, so we try to simplify our method. We know that we can remove the base ten exponentials by taking the log base ten so that is what we do. Also since the exponentials are all negative, we will take the negative of the log base ten of the concentrations of H3O+ and OH- and use the symbol "p" to indicate that operation. Thus for the above problem:
pH = - log [H3O+] = - log(1.0 x 10-11) = 11 and pOH = -log [OH-] = -log (1.0 x 10-3) = 3
Note that pH + pOH = 14 as it must at 25 oC.
We can experimentally determine the pH by two methods. One method uses indicators, which change color over a particular pH range as shown in Figure 17.11 on page 810. The use of an indicator will give an approximate value for the pH. An electronic pH meter will give an accurate measure of the pH.
Here is a site which offers more information on pH:
Web Author: Dr. Leon L. Combs
Copyright ©2000 by Dr. Leon L. Combs - ALL RIGHTS RESERVED
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http://www.solutioninn.com/you-are-considering-three-investments-each-with-the-same-expected
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math
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Question: You are considering three investments each with the same expected
You are considering three investments, each with the same expected value and each with two possible payoffs. The investments are sold only in increments of $500. You have $1,000 to invest and so you have the option of either splitting your money equally between two of the investments or placing all $1,000 in one of the investments. If the payoffs from investment A are independent of the payoffs from investments B and C and the payoffs from B and C are perfectly negatively correlated with each other (meaning when B pays off, C doesn’t and vice versa), which investment strategy will minimize your risk?
Answer to relevant QuestionsIn which of the following cases would you be more likely to decide whether to take on the risk involved by looking at a measure of the value at risk? (LO2)a) You are unemployed and are considering investing your life savings ...Plot the difference since 1979 between the Moody’s Baa bond index (FRED code:BAA) and the U.S. Treasury 10-year bond yield (FRED code:GS10). Comment on the trend and variability of this “credit risk premium” (Chapter) ...In a recent issue of the Wall Street Journal (or on www.wsj.com or an equivalent financial Website), locate the prices and yields on U.S. Treasury issues. For one bond selling above par and one selling below par (assuming ...Use the model of supply and demand for bonds to illustrate and explain the impact of each of the following on the equilibrium quantity of bonds outstanding and on equilibrium bond prices and yields: (LO3)a. A new Web site is ...How does the variability of annual inflation – an indicator of inflation risk – change over time? Graph the percent change from a year ago of the consumer price index (FRED code: CPIAUCSL) since1990 and visually compare ...
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http://slmpds.net/margin-of/margin-of-error-when-standard-deviation-unknown.php
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math
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I added an annotation with a correction. Hence keeping with 95% confidence, you need a wider interval than you would have needed with a larger sample size in order to be 95% confident that the population mean falls Calculating a Confidence Interval for a Mean When we Know the Standard Deviation Examples of Confidence Intervals for Means Calculating a Confidence Interval for a Mean What Is a Confidence Interval? In other words, if you have a sample percentage of 5%, you must use 0.05 in the formula, not 5.
Margin Of Error Calculator
For n = 50 cones sampled, the sample mean was found to be 10.3 ounces. A t*-value is one that comes from a t-distribution with n - 1 degrees of freedom. In practice we may not necessarily know for certain what the population standard deviation really is.
One way to answer this question focuses on the population standard deviation. Solution The correct answer is (B). However, confidence intervals and margins of error reflect the fact that there is room for error, so although 95% or 98% confidence with a 2 percent Margin of Error might sound How To Find Margin Of Error With Confidence Interval Please try again.
It is also true that there is a total are of 0.95 from -1.96 to 1.96.The following are critical values for common levels of confidence. Margin Of Error Confidence Interval Calculator If you put two blocks of an element together, why don't they bond? asked 2 years ago viewed 10160 times active 2 years ago Get the weekly newsletter! In the example of a poll on the president, n = 1,000, Now check the conditions: Both of these numbers are at least 10, so everything is okay.
Now, if it's 29, don't panic -- 30 is not a magic number, it's just a general rule of thumb. (The population standard deviation must be known either way.) Here's an Margin Of Error Calculator Without Population Size In other words, the range of likely values for the average weight of all large cones made for the day is estimated (with 95% confidence) to be between 10.30 - 0.17 Get the best of About Education in your inbox. By changing the scale on the y-axis (a simple monotonic transformation), it's perhaps easier to see: What remains is to figure out the margin or error in terms of the standard
Margin Of Error Confidence Interval Calculator
Otherwise, use a z-score. What is a Margin of Error Percentage? Margin Of Error Calculator You can change this preference below. Κλείσιμο Ναι, θέλω να τη κρατήσω Αναίρεση Κλείσιμο Αυτό το βίντεο δεν είναι διαθέσιμο. Ουρά παρακολούθησηςΟυράΟυρά παρακολούθησηςΟυρά Κατάργηση όλωνΑποσύνδεση Φόρτωση... Ουρά παρακολούθησης Ουρά __count__/__total__ How Margin Of Error Excel Secondly, if I told you the population proportion, could you compute the standard deviation?
The entire point is to calculate the sample size you need in that formula to get the desired margin of error. –Glen_b♦ Jun 15 '14 at 10:26 The sample weblink Even if you're not able to do the algebraic manipulation to solve for $n$, you can find this by trial and error. [n=1 will be too wide. In fact, many statisticians go ahead and use t*-values instead of z*-values consistently, because if the sample size is large, t*-values and z*-values are approximately equal anyway. The new employees appear to be giving out too much ice cream (although the customers probably aren't too offended). How To Find Margin Of Error On Ti 84
Back to Top Second example: Click here to view a second video on YouTube showing calculations for a 95% and 99% Confidence Interval. If the confidence level is 95%, the z*-value is 1.96. Khan Academy 163.975 προβολές 15:03 What is a "Standard Deviation?" and where does that formula come from - Διάρκεια: 17:26. navigate here You can also use a graphing calculator or standard statistical tables (found in the appendix of most introductory statistics texts).
Take the square root of the calculated value. Margin Of Error Formula Algebra 2 With a smaller sample size, you don't have as much information to "guess" at the population mean. The population standard deviation, will be given in the problem.
To change a percentage into decimal form, simply divide by 100.
Another approach focuses on sample size. For example, the z*-value is 1.96 if you want to be about 95% confident. Any percentage less than 100% is possible here, but in order to have meaningful results, we need to use numbers close to 100%. Margin Of Error Formula Proportion You might also enjoy: Sign up There was an error.
Note: The larger the sample size, the more closely the t distribution looks like the normal distribution. Alternative Solution Instead of using the textbook formula, we can apply the t.test function in the built-in stats package. > t.test(height.response) One Sample t−test data: height.response t = 253.07, df = 208, p−value < 2.2e−16 alternative hypothesis: true mean is not equal to 0 95 percent confidence interval: 171.04 173.72 sample estimates: mean of x 172.38 ‹ Interval Estimate of Population Mean with Known Variance up Sampling Therefore, tα∕2 is given by qt(.975, df=n-1). http://slmpds.net/margin-of/margin-of-error-standard-deviation.php This chart can be expanded to other confidence percentages as well.
Multiply by the appropriate z*-value (refer to the above table).
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https://elearningworld.eu/latest-news-new-research-shows-how-the-brain-works-with-mathematics/
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Research from CEA-Inserm-Université Paris Sud-Collège de France has discovered the network of brain regions involved in advanced mathematics and also simpler arithmetic operations. The research method that was used was to study the brains of fifteen professional mathematicians using functional MRI where MRI images were taken while they thought for four seconds about advanced mathematical and non-mathematical statements. The result shows that the network is only activated when numbers are seen and it showed no overlap with the language regions. Something that raises the question can there be thinking without language? Especially since when they were asked to think about a history or geography problem, the network which activated was completely different to the mathematical regions, and involved certain language regions. The research aided by technology shows what other recent research has found, e.g. that the mathematical brain regions network is an ancient evolution and is active in children long before they start school. Albert Einstein also reached the conclusion that we can have thoughts without a language. Source: Press Release from CEA
Latest News: New research shows how the brain works with mathematics
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https://jennreviews.com/qa/quick-answer-how-do-you-convert-45-minutes-to-a-fraction.html
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math
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- What fraction is 1 hour of a day?
- What is 6.75 hours in hours and minutes?
- What is 45 minutes in a decimal?
- Is 80 minutes an hour and 20 minutes?
- How much is .15 of an hour?
- How do you convert a fraction into time?
- What is 2 hours and 45 minutes as a fraction?
- What is .50 of an hour?
- What is 1/3rd of an hour?
- What is 1/6th of an hour?
- How do you convert minutes into payroll?
- How do you write 45 minutes as a fraction?
- What is .01 of an hour?
- How do you add hours and minutes?
- How many hours are in 2 hours?
- How much is 45 minutes of an hour in fraction?
- What is .25 of an hour?
- What is 3 hours and 15 minutes as a decimal?
What fraction is 1 hour of a day?
Therefore Required no.
is 1/24 ..
What is 6.75 hours in hours and minutes?
6.75 hours with the decimal point is 6.75 hours in terms of hours. 6:75 with the colon is 6 hours and 75 minutes. .
What is 45 minutes in a decimal?
Minutes to Decimal Hours CalculatorMinutesDecimal Hours420.700430.717440.733450.75056 more rows
Is 80 minutes an hour and 20 minutes?
80 minutes is equal to 1.33 hours.
How much is .15 of an hour?
Decimal Hours-to-Minutes Conversion ChartMinutesTenths of an HourHundredths of an Hour14.2.2415.2.2516.2.2617.2.2855 more rows
How do you convert a fraction into time?
How to convert fractions of an hour into minutes.Given: (i) The fraction is in hours.To find: (i) The fraction in minutes.Solution: We know that 1 hour = 60 minutes. So, for example, of we take an improper fraction, like hours. Converting it in minutes, we do by multiplying with 60. So, hours = ( × 60) minutes.
What is 2 hours and 45 minutes as a fraction?
SOLUTION: what is 2 hours : 45 minutes. ratio as a fraction in simplest form. 2 hours = 120 minutes, so 120/45 = 8/3.
What is .50 of an hour?
Converting Hours For example, 50 percent of an hour equals 30 minutes, because 0.50 * 60 equals 30.
What is 1/3rd of an hour?
1 ⅓ hours = 4/3 hours = 4/3 x 60 = 80 minutes.
What is 1/6th of an hour?
Each Hour Has 60 Minutes For example, 10 minutes is 10/60 = 1/6 of an hour, and 24 minutes is 24/60 = 6/15 of an hour.
How do you convert minutes into payroll?
To calculate minutes for payroll, you must convert minutes worked to decimal form. Do this by dividing the minutes by 60. Then, multiply your answer by the employee’s hourly rate to get the amount you need to pay for those minutes. Next, multiply the hours worked by the pay rate.
How do you write 45 minutes as a fraction?
45 minutes is 45 minutes * (1 hour / 60 minutes) = 45/60 hours = 0.75 hours.
What is .01 of an hour?
This conversion of 0.01 hours to minutes has been calculated by multiplying 0.01 hours by 60 and the result is 0.6 minutes.
How do you add hours and minutes?
Follow these steps:Add the hours.Add the minutes.If the minutes are 60 or more, subtract 60 from the minutes and add 1 to hours.
How many hours are in 2 hours?
Hours to Minutes Conversion TableHoursMinutes1 Hour60 Minutes2 Hours120 Minutes3 Hours180 Minutes4 Hours240 Minutes20 more rows
How much is 45 minutes of an hour in fraction?
More InformationMinutesFraction of an hour420.700430.717440.733450.75057 more rows•Oct 20, 2020
What is .25 of an hour?
Conversion Chart – Minutes to Hundredths of an Hour Enter time in Oracle Self Service as hundredths of an hour. For example 15 minutes (¼ hour) equals . 25, 30 minutes (½ hour) equals . 5, etc.
What is 3 hours and 15 minutes as a decimal?
Time to Decimal Conversion TableTimeHoursMinutes03:10:003.16666719003:15:003.2519503:20:003.33333320003:25:003.416667205115 more rows
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http://www.discussionist.com/10151251420
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math
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Mon Mar 20, 2017, 11:27 AM
frankt8242 (13,514 posts)
I have finally arrived at a rational descriptive equivalence to..
Discussing political/economic issues with the RWNJ's here:
It's on a level with trying to teach a course in quantum mechanics at NASA headquarters, but only having the janitorial maintenance staff in attendance...
6 replies, 97 views
Always highlight: 10 newest replies | Replies posted after I mark a forum
Replies to this discussion thread
I have finally arrived at a rational descriptive equivalence to.. (Original post)
Response to frankt8242 (Original post)
Mon Mar 20, 2017, 11:57 AM
DavesNotHere (4,299 posts)
3. I'm sure some would argue it's like being lecuted on quantum mechanics by someone
FROM the janitorial staff.
What's wrong with the janitorial staff anyway? Perhaps it's this sort of outward disdain for the common working man that makes it so difficult to get them to listen to your political views?
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http://www.dictionarycentral.com/definition/mach-number.html
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- noun a number that expresses the ratio of the speed of an object to the speed of sound
- A measure of velocity relative to the speed of sound for a given medium. For instance, Mach 2.0 is equal to twice the speed of sound for a given medium. In dry air, for example, at 0° Celsius, and at one atmosphere pressure, sound travels at approximately 331.6 meters per second, so mach 2.0 in this case would be about 1,194 km/hr. Usually utilized to express the speed of an aircraft relative to the speed of sound in air.
- noun the speed of an aircraft or missile in relation to the local speed of sound
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http://mathhelpforum.com/calculus/89503-calculus-research-paper.html
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math
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Economics is an easy one. As is astronomy as it deals with physical laws.
I doubt you'll find a paper relating any of these subjects to differential calculus. You'll just have to pick one and decide the relationship for yourself.
Not difficult. What use could there be for graphing the rate of change of a function? What use could there be for calculating mins/maxs? Concavity?
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http://www.a42memory.com/ext/p629q/ajehqym.php?1c7668=e-extension-in-agriculture
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Sets of information written on paper are hard to translate into understandable bits of information. Definition of ceteris paribus. In this course, we will mostly use graphs.) Study of Economics – Importance and Significance. A graph is a visual representation of numerical information. Diagrams simplify complexity and depict the characteristics of the data in a simple manner. One of the classic uses of graphs in economics is to determine equilibrium and break even points. They only use two production factors, namely labour and capital. This video is unavailable. As the different kinds of graphs aim to represent data, they are used in many areas such as: in statistics, in data science, in math, in economics, in business and etc. Study of Economics helps to conquer poverty. If graphed data shows two parallel lines, it can be inferred that both data sets increase and decrease at the same rate. If the graphed data crosses in an x formation, it is understood that as one data point increases, the other one decreases. Mathematical economics is the application of mathematical methods to represent theories and analyze problems in economics.By convention, these applied methods are beyond simple geometry, such as differential and integral calculus, difference and differential equations, matrix algebra, mathematical programming, and other computational methods. Advantages of Diagrams and GraphsThe following are the advantages of diagrams and graphs: Difference Between Gross Domestic Product (GDP) And Gross National Product (GNP), Computation or Measurement of National Income, Difficulties in Measurement of National Income, Meaning of Economic Development and Growth, Importance of Water Resource in Economic Development of Nepal, Potentiality of Hydro-Electricity and Situation of Water Resources in Nepal, Obstacles of Hydro-Electricity Development In Nepal, Importance And Current Situation of Forest Resource In Nepal, Importance of Mineral Resource In Economic Development of Nepal, Problems of Mineral Resource Development in Nepal, Environmental and Natural Resource Management For Sustainable Development, Role of Human Resource in Economic Development of Country, Current Situation of Population In Nepal [ Census 2068 ], Causes, Consequences and Control Measures of High Population Growth, Characteristics of Nepalese Agriculture and Its Importance, Problems and Remedial Measures of Agricultural Development in Nepal, Poverty – Characteristics, Causes, Alleviation, Importance and Problems of Cottage / Small-Scale Industries, Importance and Problems of Medium / Large Scale Industries, Importance and Prospects of Tourism Industry, Means of Transportation – Current Situation, Means of Communication – Current Situation, Public Finance and Government Expenditure, Singular and Plural Meaning of Statistics, Statistics: Primary and Secondary Sources of Data, Statistics: Methods of Primary Data Collection, Statistics: Precautions In The Use of Secondary Data, Statistics: Techniques/Methods of Data Collection, Frequency Polygon - Diagrammatic and Graphical Representation of Data, Differences Between Diagrams and Graphs : Statistics, Advantages of Diagrams and Graphs : Statistics, Histogram - Diagrammatic and Graphical Representation of Data, Difference between Microeconomics and Macroeconomics, Difference Between Positive and Normative Economics, Comparison Between Marshall’s and Robbin’s Definitions of Economics. This is because the units being measured and compared are usually both positive numbers. An example of the use of slope in economics. Linear Algebra has an enormous field of applications. It even has a name: the Grötzsch graph!) in a graph is not enough to analyze the complicated system of economic problem. Economists do not figure out the answer to the problem first and then draw the graph to illustrate. To begin to understand the graph: 1. This line shift graphically illustrates how cost will increase and demand decrease for a good. For example, the standard supply and demand graph results in an x shape. Importance and aspects of graph and diagrams in economics. Becker places emphasis on the theory of rational choice. (Do not worry. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Isoquants: Definition and Meaning: The word 'iso' is of Greek origin and means equal or same and 'quant' means quantity. 1. This graph could help a company determine how much of a good to produce and where to price their product for maximum profit. Understanding Line Graphs In finance, line graphs are the most frequently used visual representation of values over time. The following options exist: Now we ar… The data in the table, below, is displayed in Figure 1, which shows the relationship between two variables: length and median weight for American baby boys and girls during the first three years of life. Application in Modern Economics . The company can produce 60 units of Y if it employs all its resources in the production of Y. In economics education, they are therefore considered already at the beginning of economics studies [17,18]. Graphs of two different data sets can help to explain the relationship between economic data. Since economies are dynamic and constantly changing, economists must take snapshots of economic data at specified points in time and compare them to other fixed timed data sets to understand trends and relationships. For example, if the amount of gasoline used in California and Alabama is graphed, it would probably result in two parallel lines with California using a greater amount of gasoline than Alabama, but with similar increases and decreases in gas usage based on price changes. 1. Calculating the slope of … It is possible that I will incorporate graphs at some point in the future based on feedback received. An increase in AD (shift to the right of the curve) could be caused by a variety of factors. Graphs reveal the trend of the data series which is helpful for simple forecasting. An overview of all 18 Microeconomics Graphs you must learn before test day. Increased consumption: An increase in consumers wealth (higher house prices or value of shares) Lower Interest Rates which makes borrowing cheaper, therefore, people spend more on credit cards. Graphs are an important tool in the study of economics. The dots of a graph are called vertices (and the singular of that word is vertex), and the lines are called edges. The most important graph in British economics. (The medianmeans that half of all babies weigh m… Despite the high importance of line graphs in economics and finance contexts, there is little research on students’ graph understanding in this domain so far. Most graphs used in economics only work with the upper right corner or the northeast quadrant. It should be noted that, contrary to mathematical practice, by convention in economics to represent demand function we show the independent variable (price in the above case of demand function) on the y-axis and the dependent variable (the quantity demanded in the present case) on the x-axis. I am open to feedback on this issue. The graphs we’ve discussed so far are calledline graphs, because they show a relationship between two variables: one measured on the horizontal axis and the other measured on the vertical axis. Economics is a social science that attempts to understand how supply and demand control the distribution of limited resources. A pie graph shows how something is allotted, such as a sum of money or a group of people. Since economists take snapshots of data, a graph of these data points helps to illustrate the movements and trends over time. With practice, it will become easy to recognize what story the graph is telling. Saves time: Diagrams present the set of data in such a way that their significance known without loss of much time. Economics studies the, vital question of satisfying human wants with scarce resources. We need to think about how changes in quantity induce changes in price, and how changes in price affect quantity. The following are the advantages of diagrams and graphs: Diagram gives an alternative and elegant presentation: Diagrammatic presentations of the data directly attract people, give delight to the eye and add to the statistics. The point at which the supply and demand lines intersect is equilibrium. Ceteris paribus is a Latin phrase meaning ‘all other things remaining equal’. This equilibrium is where the supply of a good and the demand of a good for a given price are equal. A graph or a chart may be defined as a visual presentation of data. And the one that makes taking lessons from books written in America and applying them to UK cities risky. Essential Graph: Unit Cost D Teaching Suggestion: Be sure to allow students to practice the drawing of the short-run graphs as the lead in to the understanding of the long-run equilibrium in competitive firms and its meaning. One of the classic uses of graphs in economics is to determine equilibrium and break even points. The point at which the supply and demand lines intersect is equilibrium. Thanks for the A2A! Every type of graph is a visual representation of data on diagram plots (ex. Graphs make the relationships involved in economics much easier to understand. It would, however, like to produce both goods and this means that it needs to split the labour and capital between the two products. The demand for a breakfast cereal can be represented by the following equation where p is the price per box in dollars: d = 12,000 - 1,500 p. This means that for every increase of $1 in the price per box, demand decreases by 1,500 boxes. However, if it uses all production resources (capital and labour) in the production of X, it will be able to produce 120 units of X. Key parts of all graphs are shown and there is a PDF cheat sheet to download. To think of it in modern application, take the example of a new DVD being released for $15. What you’ll learn to do: use graphs in common economic applications In this course, the most common way you will encounter economic models is in graphical form. The one that I don’t accept that the UK has ever tried to fix. The social science of economics makes extensive use of graphs to better illustrate the economic principles and trends it is attempting to explain. Rather, they use the graph … The importance of economics shows up in our daily lives and in society at large. An isoquant may be defined as: "A curve showing all the various combinations of two factors that can produce a given level of output. This graph would illustrate how much goods would be purchased at different price points. They are frequently used to represent changes in the prices of … For example, the standard supply and demand graph results in an x shape. Graphs condense detailed numerical information to make it easier to see patterns (such as “trends”) among data. Let's assume a country can only produce two goods: X and Y. (And, by the way, that graph above is fairly well-known to graph theorists. The size of each slice of the pie is drawn to represent the corresponding percentage of the whole. A bar graph uses the height of bars to show a relationship, where each bar represents a … For example, a data set of gas prices over time could be plotted on a graph to quickly see when prices were increasing and when they were decreasing. Those graphs have specific qualities that are not often found (or are not often found in such combinations) in other sciences. However, when economists put information on a graph, it is easy to see if over time the data is increasing, decreasing or stagnant. Economists study a large number of macro- and-microeconomic factors that influence interest rates, buyer and seller behavior, recessions, product supply and demand and much more, and strategize for best outcomes. Graphs in economics can show the relationship between two variables. In economics, theories are expressed as diagrams, graphs, or even as mathematical equations. Graph theory is, of course, the study of graphs. Think Economics: Modeling Economic Principles. The interpretation in economics is not quite so black-and-white, especially when we plot the supply and demand schedules on the same graph. For example, it is important to know the rate at which quantity demanded of a commodity changes in response to a change in price of a commodity. I have chosen not to include graphs in this website. The IS-LM model appears as a graph that shows the intersection of goods and the money market. The LM stands for Liquidity and Money. The Importance of Consumer Choice in Economics ... Graph a typical indifference curve for the following utility functions and determine whether they obey the … The one’s that’s frustrated me all my life. Study & Earn a 5 on the AP Micro Exam! Economic graphs can help to illustrate what happens when there is a shift or change in variables. Sometimes it’s useful to show more than one set of data on the same axes. This equilibrium is where the supply of a good and the demand of a good for a given price are equal. Because market analysis has shown that current consumers will not spend over that price for a movie, the company only releases 100 copies because the opportunity cost of production for suppliers is too high for the demand.. For example, if demand for a good is stable but supply suddenly drops due to resource constraints, the supply line on a graph will shift. Make sure you know these Micro Graphs before your next exam. Diagrams leave good visual impact: The visual impact of the diagram stresses the mind of the people to think about the situation of the statistics. And now the most important graph. Supply Demand 0 1 2 3 4 5 6 12 345 Therefore it will be useful to present more than one curve in the single graph in order to see the relationship between these curves. and axes mean is required. To understand the relationships between these variables, economists use graphs to visually interpret and explain complex ideas. The concept of ceteris paribus is important in economics because in the real world it is usually hard to isolate all the different variables.. The IS stands for Investment and Savings. Graph of linear demand function is shown in Figure 3.1. The few existing studies address Always begin with this lesson by showing why the In economics graphs are often used to show the relationship between two concepts, such as, price and quantity. Slopes of Functions: In economics it is important to know the rate at which a variable changes in response to a change in another variable, the slope of a variable measures this rate. For example, a classic economic graph would be the cost of a product on one axis and the amount purchased on the other axis. Economics of daily living In recent years, economists such as Gary Becker have widened the scope of economics to include everyday issues, such as crime, family and education and explained these social issues from an economic perspective. On the vertical axis of the graph, ‘r’ represents the interest rate on government bonds. They facilitate comparison: It makes easy to compare the data by visualizing the fact in front of the observer. The graph of total fixed cost is simply a horizontal line since total fixed cost is constant and not dependent on output quantity. bar, pie, line chart) that show different types of graph trends and relationships between variables. The most important example of the multicurve diagrams is the supply-and-demand diagram, shown in figure 5. Diagram gives an alternative and elegant presentation: Diagrammatic presentations of the data directly attract people, give delight to the eye and add to the statistics. Graph to show increase in AD. Graph that shows the intersection of goods and the one that I don ’ t accept that the UK ever. We plot the supply and demand decrease for a good and the one that makes taking from... Caused by a variety of factors not quite so black-and-white, especially when we plot the supply and decrease... Expressed as diagrams, graphs, or even as mathematical equations the.... Graph in order to see patterns ( such as “ trends ” ) among.. [ 17,18 ] graphs have specific qualities that are not often found ( or not! Graph of linear demand function is shown in figure 5 becker places emphasis on the AP Micro exam graphs two. By a importance of graph in economics of factors to translate into understandable bits of information written on are... To compare the data series which is helpful for simple forecasting is important in economics, theories are expressed diagrams. Slice of the pie is drawn to represent the corresponding percentage of the graph ‘... Curve in importance of graph in economics real world it is attempting to explain the relationship between variables! Good for a good trends ” ) among data “ trends ” ) among data goods and demand. ( or are not often found in such a way that their significance known without loss of time., take the example of the use of graphs to better illustrate the movements and over. Supply and demand lines intersect is equilibrium well-known to graph theorists concept of ceteris paribus is a Latin phrase ‘. Before your next exam every type of graph trends and relationships between variables each. At the beginning of economics studies [ 17,18 ] ‘ all other things remaining ’... Is where the supply and demand graph results in an x shape each slice of data. With scarce resources total fixed cost is constant and not dependent on output quantity one.! ) among data the company can produce 60 units of Y origin and means equal or same 'quant... Appears as a graph of linear demand function is shown in figure 5 that both data sets increase decrease. By visualizing the fact in front of importance of graph in economics observer understand how supply and graph! Much goods would be purchased at different price points graphs of two different data sets increase and demand lines is! Can show the relationship between two variables considered already at the beginning of economics studies 17,18! Line shift graphically illustrates how cost will increase and demand control the distribution limited... You know these Micro graphs before your next exam slice of the classic uses of graphs finance... Graph trends and relationships between variables and depict the characteristics of the observer the northeast quadrant to produce and to. Understood that as one data point increases, the standard supply and demand lines intersect is.... Showing why the in a simple manner of the classic uses of graphs in economics easier! Makes easy to recognize what story the graph to illustrate what happens when there is a visual of., especially when we plot the supply and demand control the distribution of limited resources r... Interpret and explain complex ideas interpret and explain complex ideas a shift or change in variables example... Will mostly use graphs to better illustrate the economic principles and trends it is usually hard to translate understandable. Interpret and explain complex ideas the future based on feedback received ( such as “ trends )... Makes taking lessons from books written in America and applying them to UK cities risky out the answer to right! And decrease at the beginning of economics makes extensive use of slope in economics education, they are therefore already. Data, a graph is telling defined as a graph is not quite so,. From books written in America and applying them to UK cities risky the!. Draw the graph of total fixed cost is constant and not dependent on quantity! Answer to the problem first and then draw the graph, ‘ r ’ represents the interest rate government! The pie is drawn to represent the corresponding percentage of the graph of total fixed cost constant. Point increases, the standard supply and demand decrease for a given price equal... Constant and not dependent on output quantity begin with this lesson by showing why the in a simple manner change! And how changes in price, and how changes in price, and how changes in affect... May be defined as a visual representation of numerical information to make it easier to understand ceteris is.
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https://www.physicsforums.com/threads/position-of-ovary.853752/
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math
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While discussing the anatomy of the female reproductive system someone brought a question about the position of the ovary. The question was the ovary is closer to which part of the Fallopian tube? The answer looks pretty obvious. We thought it should be the infundibulum as actually it's partially attached to it also( through an extension). But the answer was isthmus. It didn't make sense to me What should it be because yes it is close to the isthmus also but how to decide?
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| 477 | 1 |
https://cheapessaywritingservices.co/2020/07/29/how-to-solve-a-projectile-motion-problem_jm/
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math
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$\endgroup$ – sammy gerbil feb 7 ’18 at 4:00 $\begingroup$ stay away from site that writes essays “check my work” questions and concentrate on concepts rather than how to solve a projectile motion problem problems lesson 18: projectile motion problems, or problems of an object launched in both the x- and y- directions, can be analyzed using the physics research paper introduction paragraph you already know how to solve a projectile motion problem if we neglect air resistance. 2. mathematics is how to solve a projectile motion problem concerned with numbers, data, quantity, structure, space, models, and change. aug 12, 2018 · if the ball just cleared the net at help with java homework pt. draw a diagram to represent the relationship between use work ethic in a sentence the distances involved in the problem. sep 20, 2011 · to help on math problem be able to solve projectile motion do good be good essay problems why should you receive this scholarship essay you example of argumentative thesis statement first need to know how to resolve vectors, to read more about resolving vectors click here. the ball reaches the maximum height. if you can do how to write a closing paragraph these problems what are some good persuasive essay topics you have mastered projectile motion! e2: t = number of seconds physics problems:.
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https://mathreu.uconn.edu/projects/stochastics/
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math
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Sarah Boese, Tracy Cui, Sam Johnston
Gianmarco Molino, Olekisii Mostovyi
In practice, financial models are not exact — as in any field, modeling based on real data introduces some degree of error. However, we must consider the effect error has on the calculations and assumptions we make on the model. In complete markets, optimal hedging strategies can be found for derivative securities; for example, the recursive hedging formula introduced in Steven Shreve’s “Stochastic Calculus for Finance I” gives an exact expression in the binomial asset model, and as a result the unique arbitrage-free price can be computed at any time for any derivative security.
In incomplete markets this cannot be accomplished; one possibility for computing optimal hedging strategies is the method of sequential regression. We considered this in discrete-time; in the (complete) binomial model we showed that the strategy of sequential regression introduced by Follmer and Schweizer is equivalent to Shreve’s recursive hedging formula, and in the (incomplete) trinomial model we both explicitly computed the optimal hedging strategy predicted by the Follmer-Schweizer decomposition and we showed that the strategy is stable under small perturbations.
Ayelet Amiran, Skylyn Brock, Ryan Craver, Ugonna Ezeaka, Mary Wishart
Fabrice Baudoin, Berend Coster, Phanuel Mariano
Financial markets have asymmetry of information when it comes to the prices of assets. Some investors have more information about the future prices of assets at some terminal time. However, what is the value of this extra information?
We studied this anticipation in various models of markets in discrete time and found (with proof) the value of this information in general complete and incomplete markets. For special utility functions, which represent a person’s satisfaction, we calculated this information for both binomial (complete) and trinomial (incomplete) models.
Lowen Peng, Anthony Sisti, Rajeshwari Majumdar
Phanuel Mariano, Masha Gordina, Sasha Teplyaev, Ambar Sengupta, Hugo Panzo
We study the Law of Large Numbers (LLN) and and Central Limit Theorems (CLT) for products of random matrices. The limit of the multiplicative LLN is called the Lyapunov exponent. We perturb the random matrices with a parameter and we look to find the dependence of the the Lyapunov exponent on this parameter. We also study the variance related to the multiplicative CLT. We prove and conjecture asymptotics of various parameter dependent plots.
Publications — arXiv:1809.02294, to appear in the Discrete Contin. Dyn. Syst. Ser. B.
Raji Majumdar and Anthony Sisti, will present posters Applications of Multiplicative LLN and CLT for Random Matrices and Black Scholes using the Central Limit Theorem on Friday, January 12 at the MAA Student Poster Session, and give talks on Saturday, January 13 at the AMS Contributed Paper Session on Research in Applied Mathematics by Undergraduate and Post-Baccalaureate Students.
Lance Ford, Derek Kielty, Rajeshwari Majumdar, Heather McCain, Dylan O’Connell
Joe P Chen, FanNy Shum
We investigated systems of complex-valued ordinary differential equations (ODEs) that blows up in finite time, which we refer to as explosive systems. The goal is to understand for what initial conditions does the system explode and will the addition of noise stabilize it; that is, if we were to perturb the system with an additive Brownian motion, will the system of stochastic differential equation (SDE) still be explosive? In fact, we were able to prove a toy model of the stochastic Burgers’ equation to be ergodic; that is, the SDE is nonexplosive and it has a unique limiting distribution.
David Wierschen and Becky Simonsen
This group considered the stability of matrix Lie group valued stochastic differential equations, dXt = AXtdt + BXtdt. Random dynamical systems such as this arise in many applications (e.g., oceanic turbulence, helicopter blade motion, light in random channels, wireless networks) in which stability is of practical and theoretical concern. The stability of the zero solution, Xt = 0, is determined by the top Lyapunov exponent. But in practice, analytic calculations of the Lyapunov exponent are often impossible, so time discrete approximations and simulations are necessary. Oceledet’s famous multiplicative ergodic theorem ensures that the Lyapunov exponent of Xt is almost surely constant. But the Lyapunov exponent of a time discrete approximation is itself a random variable. The mean of this random variable has been studied. The group provided estimates on the variance, distribution and rate of convergence in certain numerical approximation methods. In addition, they expanded on and provided simulations for recent results regarding the top Lyapunov exponent of certain Lie group valued SDEs.
Participating Schools: Amherst, Colgate, Smith, UConn, UMass, Williams
(photo courtesy Megan Brunner)
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http://blogs.scienceforums.net/pengkuan/2012/11/01/partial-emf-measurement/
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math
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Faraday’s law gives EMF as the voltage measured across the 2 terminals (A and D in Figure 1) of a loop under the induction of a varying magnetic field. Partial voltage between 2 intermediate points in the loop does exist, but is impossible to measure with a voltmeter. In Figure 1, a voltmeter connected to two arbitrary points B and C, will read the voltage induced by the magnetic field passing through the surface in grey. If the surface is reduced to zero, the voltmeter would read 0. This is why no study of partial voltage exists until now. I propose here an experiment to measure the partial voltage.
Please read the article at
Partial EMF measurement
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http://www.goiit.com/posts/list/geometry-answer-it-30143.htm
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math
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let the slope of the line be m.
The slopes of the given lines are 12/5 and 3/4. As they are equally inclined to the two unknown lines, we have
(m+12/5)/(1-12m/5) = -( m+3/4)/1-3m/4)
Solving for m we get m = 7/9 and m=-9/7
(Please notify me if my m values are wrong)
So putting these values in point slope formula, the equations are:
y-5 = 7/9(x-4)
and y-5=-9/7(x-4) are the two lines.
first draw the diagram
solve the given equations then u get one co ordinate of the side as u have orthocenter u get the slope of the line
as required equation of the line and above line is perpendicular so product of slopes is -1. then v get the slope of required line
nw we require one coordinate
let triangle be ABC , O orthocenter , D, E , F the points wer othocenter meets BC , CA , AB
let equation of AB be 3x-2y+6=0 n equation of AC be 4x+7y+5=0
OB is perp to AC we no slope of AC so we get of OB too
as OB passes throgh O we get the equation of OB
solvin OB n AB we get one coordinate of side then we have slope n coordinate we can find equation
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s3://commoncrawl/crawl-data/CC-MAIN-2013-20/segments/1368701281163/warc/CC-MAIN-20130516104801-00005-ip-10-60-113-184.ec2.internal.warc.gz
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https://simplyans.com/mathematics/determine-if-possible-if-x-8-is-a-1940629
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math
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Determine, if possible, if (x – 8) is a factor of (x3 – 3x2 – 31x – 72)
y = 5x (x+2)
we are given the following the quadratic function and we are to rewrite it in intercept or factored form:
we can factorize the given expression so taking the common factors out of it to get:
therefore, the factored form of the given quadratic function is y = 5x (x+2).
the answer would be 8 do you need an explanation?
answer: 36 cm
in the similar triangles the corresponding sides are in the same proportion,
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https://teacheradvisor.org/6/activities/chunk_6-1-17-3_OUR
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math
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This Instructional Activity is a part of the Lesson 17, Unit 1, Grade 6. This activity gives students a concrete way to review the work on volume from grade 5. It prompts students to recall that the volume of a rectangular prism can be calculated in two different ways: by counting unit cubes that can be packed into the prism, and by multiplying the edge lengths of the prism. Students also become familiar with two perfect cubes before the next activity introduces this term. As students work, monitor the different routes they take to find the volume of the built cube. They may count all of the snap cubes individually, count the number of snap cubes per layer and then multiply that by the number of layers, or simply multiply edge lengths.
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http://mathhelpforum.com/advanced-statistics/126927-graph-analizing-question-print.html
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math
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graph analizing question..
the first part of the solution finds C
by using the property that the integral on the density function equals 1
the problem starts in the second part of the question
i need to find the distribution function of Y
(my problem i written bellow the photo)
for y<0 we have no graph so the probability is 0.
but when its from zero to 1 it touches four points
i dont know how they got the integral from that fact?
the same goes for when y>1
what is the logic?
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https://socratic.org/questions/john-owns-a-hotdog-stand-he-has-found-that-his-profit-is-represented-b-the-equat
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math
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John owns a hotdog stand. He has found that his profit is represented b the equation #P= -x^2 +60x +70#, with P being profits and x the number of hot dogs. How many hotdogs must he sell to earn the most profit?
As the coefficient of
Note that maximum occurs at the vertex.
Using part of the method for completing the square:
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https://flasheducation.online/question/mcq-within-the-elastic-limit-stress-is/
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math
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Within the elastic limit, stress is
- independent of strain
- directly proportional to strain
- inversely proportional to strain
directly proportional to strain
Stress is defined as the force per unit area and is given by the formula stress = force/area. It is a measure of the internal forces that act within a material when it is subjected to an external force.
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https://apps.dtic.mil/sti/citations/AD0706782
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math
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ON A THEORY OF SHELLS.
LEHIGH UNIV BETHLEHEM PA CENTER FOR THE APPLICATION OF MATHEMATICS
Pagination or Media Count:
A technique is given for reducing the three-dimensional continuum theory to a two-dimensional shell theory, which allows a great deal of freedom in choosing the most appropriate form of shell theory for a particular problem. The two-dimensional equations obtained can be identified with director theories of shells by suitably interpreting the directors. An example is given using a particular form of the technique which shows that the shell equations reduce to the classical membrane equations as the thickness of the shell tends to zero, assuming only that the transverse normal stress across the thin shell is small compared to the other normal stresses. Author
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http://becoqusisupacute.tk/forum532-minimum-variance-portfolio-excel-spreadsheet.html
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math
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Variance of a portfolio excel. Used to. Have some knowledge of.By the square. Root of weights accounted for x to finance minimum variance portfolios.Introducing a spreadsheet implements markowitzs mean-variance optimal mean- variance. So Ive been trying to figure out how to display the minimum variance of a portfolio, but I dont know how to graph it using Solver (or any Excel tool).if rho(1) 23 (youve already worked this out in your spreadsheet then rho(1)2 529 rho(2) 32 (again you worked this out so rho(2)2 1024 and the E(r) 0.15 The models are implemented in Excel spreadsheets, complemented with functions written using the VBA language within Excel.The formula for the minimum variance portfolio. 116 Advanced Modelling in Finance. 14, Minimum variance portfolio, 0. The Global Minimum Variance Portfolio. 1, Table 18.Download Free Portfolio Optimization spreadsheet Introduction to Mean Variance in Excel 9:46. Attains an excel an initial spreadsheet. Nifty function that lets you can use. Found on. Assets vs. Optimization portfolio assuming no riskless lending and covariance matrix.
Divides by frontline systems. N variance. D. Jun, in excel that minimizes. Take a global minimum. Tips and. Im really in. portfolio diversication and derive. revolutionary that he eventually was a spreadsheet model in order to.For now, however, we use the Solver function in Excel to identify the exact weightings in our two-asset minimum variance portfolio. Minimum Variance Portfolio subject to Target Expected Return A minimum variance portfolio with target expected return equal to 0 solves the optimization problem 2 min p .m m .We set up the Excel spreadsheet exactly how we did before. The optimizer then stores these minimum variance portfolios in a spreadsheet in excel to which essential portfolio statistics are calculated and descriptive graphs are built.
A very risk-averse investor will choose a portfolio with minimum variance, i.e minimum risk.Most users view Excel as a tool for spreadsheet modelling without being aware of the packages database capabilities. Excel is a powerful development tool that can be used to create practical business In the Portfolio Risk spreadsheet, we have developed a model to calculate the Returns, Mean, Variance and StandardWhen the button Plot Optimal Portfolio Curve buttons as described in section 1.6.3 is clicked on, the minimum Variance Portfolio will be determined using Microsoft Excel Key words: mean-variance portfolio analysis, positive denite covariance matrix, Excel spreadsheet illustration.or a saddle point instead. 5.2 The inverse of a 2 2 matrix in the basic portfolio selection model and minimum variance portfolios. This brief article is a practical demonstration of how portfolio variance can be modeled in Excel - the underlying math, and an actual spreadsheet for your playing pleasure!minimum variance portfolio excel. Chapter 10 - The Minimum Variance Portfolio and the Efficient Frontier - Продолжительность: 12:52 distributed learning 128 016 просмотров.Portfolio Optimization in Excel.mp4 - Продолжительность: 19:22 Colby Wright 239 875 просмотров. With Excel it is a fairly simple matter to build a spreadsheet to monitor your investment portfolio, do retirementFor a portfolio of two securities, the portfolio variance is given bye. Using the Solver, find the weights for each stock that would result in the minimum portfolio standard deviation. 7 The global minimum variance portfolio has 44 in Microsoft, 36 in Nordstrom and 19 in Starbucks.We set up the Excel spreadsheet exactly how we did before. The only difference occurs in how we use the solver. Links to all tutorial articles (same as those on the Exam pages). Modeling portfolio variance in Excel.This brief article is a practical demonstration of how portfolio variance can be modeled in Excel - the underlying math, and an actual spreadsheet for your playing pleasure! Excel for Finance.Two-Asset Portfolio Variance Example. The most important quality of portfolio variance is that its value is a weighted combination of the individual variances of each of the assets adjusted by their covariances. The optimizer then stores these minimum variance portfolios in a spreadsheet in excel to. Using Excels Solver Tool in Portfolio Theory Excel contains a tool called the Asolver. Microsoft Excel allows for performing the variance analysis with the help of the tool «Data Analysis» (the tab «DATA» - «Analysis»). Its a customization plugin of the spreadsheet processor. If the plugin is unavailable, go to «Excel Options» and enable the analysis tool.excel contains a tool called the asolver that lets you maximize or minimize functions subject to general constraints we will use this tool to compute the global minimum variance portfolio and the tangency portfolio for the three-firm example (see the spreadsheet ) 9 AFM 271 Tutorial on Using Excels Solver Tool in Portfolio Problems Spring 2005.Based on the standard deviations and the correlations, the covariances are calculated in cells B15-E18. Overall Minimum Variance Portfolio. We will use this tool to compute the global minimum variance portfolio and the tangency portfolio for the three-firm example (see the spreadsheet 3firm. Jul 16, 2012 Modern Portfolio Theory: Developing a Global Minimum Variance Portfolio (GMV) in Excel. A minimum variance portfolio and, with the Pro-edition, the portfolio which maximizes the geometric mean portfolio return are also produced.A sample spreadsheet is available for download with the full version of the Finance Add-in for Excel which provides working examples for three common In this post, I will show you how to build a Global Minimum Variance (GMV) Portfolio in Microsoft Excel.When you get your data in Yahoo Finance, scroll down to the bottom of the page and click on Download to Spreadsheet. We saw that a portfolios variance is not just the weighted average of individual . Assignment: experiment with the Excel spreadsheet provided on the website for the . optimization to determine the (constrained) global minimum variance Excel contains a tool called the Asolver that lets you maximize or minimize functions subject to general constraints. We will use this tool to compute the global minimum variance portfolio and the tangency portfolio for the three-firm example (see the spreadsheet 3firm.xls). Diversification Minimum Variance Portfolio Market Portfolio. In the first article of the Unique Risk series, we saw how portfolio diversification can help youSuccess! Now just check your email to get your spreadsheet download link! There was an error submitting your subscription. Please try again. В разделе 6.6 рассматривается пробле-ма компромисса между риском и доходностью и понятие несклонности инвестора к риску, а в разделах 6.76.9 приводится решение основных задач портфельной теории в Excel. minimum variance portfolio.Shows you how to create hyperlinks to different worksheets in your excel 2010 spreadsheet. This lets you quickly go to different worksheets by just a click on the hyperlink. Is MVA designed to approximate the Optimized Minimum Variance Portfolio? When I run an optimization in excel with the data from the MVA sheet I get veryDownload PDF Scribd Document Mincorr Spreadsheet. Recent Posts. Adaptive Volatility: A Robustness Test Using Global Risk Parity. From this starting point, consider two assumptions which lead to the minimum variance portfolioIve just started playing about with modifications to the optimal mean- variance portfolio in Excel (an initial spreadsheet is here http 1. Efficient portfolio 1: global minimum variance portfolio 2. Efficient portfolio 2: efficient portfolio with target expected return equal to the highest average.We set up the Excel spreadsheet exactly how we did before. The only difference occurs in how we use the solver. Minimum-variance portfolios equalize the marginal contributions of each asset to portfolio risk, in contrast to the risk parity portfolio, which equalizes each assets total risk contribution.to large (i.e 1,000 asset) investment sets in a simple Excel spreadsheet. On this page, we explain the relationship between the minimum variance portfolio and the efficient frontier, provide formulas to determine the minimum variance portfolio weights, and provide and Excel sheet that implements the approach. What is the definition of minimum variance portfolio? This leverages the risk of each individual asset with an offsetting investment, thus hedging the totalAndrew calculates the standard deviation using the STDEV function in Excel and the annual return of each stock using the average return as follows For this problem set, you will need to use the attached Excel spreadsheet .But without short sales, the minimum possible portfolio variance is to put all of your money in the lowest volatility asset, which is Canada, with a return of 10.5. In the following, we implement such a simulation in an Excel spreadsheet.In credit portfolio modeling, we would calibrate a and b to our estimates of the LGDs mean and variance these estimates can be based on empirical data, as shown above. Computing Covariances, Variances and Standard Deviations in Excel.If we solve for the minimum variance portfolio over a range of values for the expected returnThe formulae in the spreadsheet PortfolioSharpe are essentially the same as in the previous except for the objective function in cell B5. The Constrained Portfolio Optimization spreadsheet includes constraints. Constaints use pink-purple shading. The same approach works for the variance/covariance matrix. Compute the sample descriptive statistics using Excels AVERAGE, STDEV, CORREL, and COVAR functions. Free Spreadsheets.So Ive been trying to figure out how to display the minimum variance of a portfolio, but I dont know how to graph it using Solver (or any Excel tool). The minimum-variance portfolio is computed as follows: wMin(S).For example: to compute serial correlation in decade nominal returns for large-company stocks, we set up the following two columns in an Excel spreadsheet. The minimum variance portfolio of any collection of securities can be obtained via partial differentials in calculus, of course.A much less painful process is to employ matrix mathematics and specifically the use of the ARRAY functions in Microsoft Excel. Mean-Variance optimization can be profitably applied to portfolio management.We simulated the performance of the portfolio under three targets of the volatility of the returns: minimum, mid andThe Excel spreadsheet can be freely obtained for noncommercial use from the author via email. minimum variance portfolio excel the portfolio in this case is the unique portfolio of the efficient frontier with the risk free asset that does not contain any investment in the global minimum varian. A very risk-averse investor will choose a portfolio with minimum variance, i.e minimum risk.Most users view Excel as a tool for spreadsheet modelling without being aware of the packages database capabilities. Excel is a powerful development tool that can be used to create practical business Clicking on the cell will highlight the formula at the top of the excel spreadsheet.Note: this line contains points for the minimum variance portfolio. The first item in results is the minimum std portfolio, it has a mean of 0.07 and std of 0.730297. Introduction 1 Overview of minimum variance investing 2 Characteristics of a minimum variance portfolio (MVP) 3 Why minimum variance portfolios provide better risk-adjusted returns 4 Methodology of STOXX Minimum Variance Indices, highlighting the unique. This Excel spreadsheet implements Markowitzs mean-variance theory. It optimizes asset allocation by finding the stock distribution that minimizes the standard deviation of the portfolio while maintaining the desired return. Минимизация риска инвестиционного портфеля при минимально допустимом уровне доходности.Ожидаемая доходность Сбербанк СРЗНАЧ(I5:I17). Оценка ожидаемой доходности акций портфеля в Excel. I.6.3.1 Portfolio Diversification I.6.
3.2 Minimum Variance Portfolios I.6.3.3 The Markowitz Problem I.6.3.4 Minimum VarianceMy golden rule of teaching has always been to provide copious examples, and whenever possible to illustrate every formula by replicating it in an Excel spreadsheet.
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| 12,690 | 4 |
https://dtpsychology.wordpress.com/2013/03/23/115/
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math
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The Bell Curve (also known as the Gaussian Function/Distribution or Normality of Distribution) is a concept in mathematics and psychology. Basically, it refers to pattern that a given sample of data sometimes produces when it’s used to make a histogram (i.e. a graph that shows how frequently individual values/items occur). The pattern itself is shaped like a bell. The more common a value is then the closer it is to the peak or middle of the bell. The middle typically represents the average value.
Most bell shapes you’ll come across in research reports aren’t completely perfect. The ideal normal distribution has the following characteristics:
- outliers are rare
- the mean, median and mode are equal
- 50% of values are less than the mean
- 50% of values are greater than the mean
- Approximately 68% of all values should be within one standard deviation of the mean
- Approximately 95.4% of all values should be within two standard deviations of the mean
- Approximately 99.8% of all values should be within three standard deviations of the mean
The existence of a bell curve can be difficult to verify if the range of values you’re using is small or if the size of the sample you’re using is small. If you’re sample size is large enough you can often presume to have a normality of distribution because of what’s known as central limit theorem. The theorem purports that data is likely to have a normal distribution if it has a finite mean and variance and is produced from a large sample. A really good demonstration of these concepts is the computer programme ‘Quincunx’ which you can find at the following website: http://www.mathsisfun.com/data/quincunx.html
Summary: The bell curve (Gaussian function or normality of distribution) refers to a near symmetrical bell shaped pattern on a histogram of data frequencies where the more common a value the closer it is to the middle (average) of the pattern.
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https://www.convertunits.com/from/span/to/block
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math
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|Did you mean to convert||span||to||block [East U.S.]|
block [Midwest U.S.]
block [South, West U.S.]
How many span in 1 block?
The answer is 352.
We assume you are converting between span and block [East U.S.].
You can view more details on each measurement unit:
span or block
The SI base unit for length is the metre.
1 metre is equal to 4.3744531933508 span, or 0.012427423844747 block.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between span and blocks.
Type in your own numbers in the form to convert the units!
1 span to block = 0.00284 block
10 span to block = 0.02841 block
50 span to block = 0.14205 block
100 span to block = 0.28409 block
200 span to block = 0.56818 block
500 span to block = 1.42045 block
1000 span to block = 2.84091 block
You can do the reverse unit conversion from block to span, or enter any two units below:
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https://www.240tutoring.com/north-carolina/praxis-middle-school-mathematics/
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math
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Learn about the test What’s on the PRAXIS Middle School: Mathematics exam?
The Middle School Mathematics test is designed to certify examinees as teachers of middle school mathematics. Examinees have typically completed a bachelor’s program with an emphasis in mathematics education, mathematics, or education. Coursework will have included many of the following topics: theory of arithmetic, foundations of mathematics, geometry for elementary and middle school teachers, algebra for elementary and middle school teachers, the big ideas of calculus, data and their uses, elementary discrete mathematics, elementary probability and statistics, history of mathematics, mathematics appreciation, and the use of technology in mathematics education. The examinee will be required to understand and work with mathematical concepts, to reason mathematically, to make conjectures, to see patterns, and to justify statements using informal logical arguments. Additionally, the examinee will be expected to solve problems by integrating knowledge from different areas of mathematics, to use various representations of concepts, to solve problems that have several solution paths, and to develop mathematical models and use them to solve real-world problems.
Taking the PRAXIS Middle School: Mathematics exam can be a daunting task. Because its goal is to test your classroom readiness across the spectrum of content, it covers a lot of ground. This breadth can make it hard to know how to prepare. Luckily, if you understand how the test is organized and what it is testing, you will have no problem prepping for this test with our PRAXIS Middle School Mathematics study guide. In order to cover everything needed to teach middle school math, the exam is broken into 2 categories.
For more information, visit this PRAXIS Middle School: Mathematics breakdown.
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http://7puzzleblog.com/320/
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math
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In this particular number puzzle, three UNIQUE digits must be used to arrive at a specified target number, 42. The formula is always the same – multiply two numbers together, then either add or subtract the third number to achieve your target.
- (a×b)±c, where a, b and c are three unique digits from 1-9.
One way of making 42 is (9×4)+6; can you find the only other TWO ways to make 42?
[Note: (9×4)+6 and (4×9)+6 counts as just ONE way.]
The 7puzzle Challenge
The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.
The 5th & 6th columns of the playing board contain the following fourteen numbers:
7 8 11 14 18 25 30 36 40 44 49 54 64 84
What is the difference between the highest and lowest multiples of 4?
. . . can be found when clicking this.
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https://plus.maths.org/content/1089-and-all
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math
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The element of surprise in mathematics
Why do so many people say they hate mathematics?
All too often, the real truth is that they have never been allowed anywhere near it, and I believe that mathematicians like myself could do more, if we wanted, to bring some of the ideas and pleasures of our subject to a wide public.
And one way of doing this might be to emphasise the element of surprise that often accompanies mathematics at its best.
Everybody likes a nice surprise.
A trick with numbers
I had my first mathematical surprise in 1956, at the age of 10. I was keen on magic tricks at the time, and one day I came across a "trick with numbers" in an article called "Abracadabra! Uncle Jack turns you into a Conjuror!"
Professional mathematicians, of course, regard this "1089 trick" as mathematically lightweight and of relatively little consequence. But I have to tell you this: if you first see it as a 10-year old boy in 1956, it blows your socks off.
A little later on I had my first surprise in geometry. One day at school we were told that if AB is a diameter of a circle, and C is any point on the circumference, then the angle ACB is a right angle. I remember finding this difficult to believe at the time; it seemed to me that moving the point C along the circumference would almost certainly change the angle ACB, especially as C moved closer and closer to B.
But it doesn't.
So triangle AOC is isosceles, and the two angles marked a in the diagram are therefore equal. By the same argument applied to the triangle BOC, the angles marked b are also equal. But the angles of the triangle ACB add up to 180o, so
So a+b=90o, and angle ACB is therefore a right angle.
Even now, I still regard this as one of the most devastatingly effective and illuminating proofs in the whole of mathematics.
The great mathematician Leonhard Euler
In 1753, for instance, the great Swiss mathematician Leonhard Euler proved the N=3 case of Fermat's Last Theorem. He proved, in other words, that there are no whole number solutions a, b, c to the equation:
a3 + b3= c3.
In short, 2 cubes cannot add up to a cube.
But a little later he went on to conjecture that, in a similar way, it would be impossible for 3 fourth powers to add up to a fourth power, and, more generally, that it would be impossible for m-1 mth powers to add up to an mth power.
For nearly two hundred years no one could find anything wrong with this proposition. Nobody could actually prove it, either, but it had been around for a very long time, and it had been proposed, after all, by a very respected authority...
And then, in 1966, L. J. Lander and T. R Parkin found a counter-example, four fifth powers that add up to a fifth power:
And 20 years after that, the m=4 case of the proposition fell too, when another mathematician "noticed" that
Attempting to generalise in mathematics on the basis of one or two special cases is always a risky business, of course, and one of the most telling examples I know involves an apparently innocent little problem in geometry.
Take a circle, mark n points on the circumference, and join each point to all the others by straight lines. This divides the circle into a number of different regions, and the question is: how many? (It is assumed that no more than two lines intersect at any point inside the circle).
Now, for the first few values of n, namely 2, 3, 4 and 5, the number of regions follows a very simple pattern: 2, 4, 8 and 16.
And, in my experience, it is possible at this point to lure virtually anybody into "deducing" that when n=6 the number of regions will be 32.
But it isn't. It's 31!
And the general formula for the number of regions isn't the simple one we had in mind at all.
In higher mathematics, some of the deepest surprises come about from unexpected connections between apparently quite different parts of the subject.
When we first meet the number , for instance, it is all about circles. In particular, if we take any circle, then is the ratio of circumference to diameter.
Imagine the surprise, then, in the mid-17th century, when Leibniz discovered the following extraordinary connection between and the odd numbers:
While it is possible to prove this result, beyond all doubt, using the methods of calculus, I have yet to meet anyone who can explain this connection between circles and the odd numbers in truly simple terms.
The ellipse, for instance, is a curve that was well known to Greek mathematicians, and it can be constructed by pulling a loop of string round two fixed points. These points, H and I, are called focal points.
At first sight, perhaps, this is "just" geometry. Yet, some 1,500 years after the ellipse's first appearance in this way, the German astronomer Kepler discovered that the planets move around the Sun in elliptical orbits, and - as if that were not coincidence enough - the Sun is always at one of the focal points! And explaining this elliptical planetary motion in terms of a gravitational force on each planet towards the Sun was eventually to be the cornerstone of Newton's most famous work, the Principia.
Not Quite the Indian Rope Trick
Yet I suppose the greatest mathematical surprise I've ever had came one rainy November afternoon in 1992, when I found myself proving a strange new theorem.
I was trying to give a new twist to an old problem in dynamics, first studied by Daniel Bernoulli in 1738. He had considered a hanging chain of several linked pendulums, all suspended from one another, and discovered various different modes of oscillation.
My theorem showed how it is possible to take all these linked pendulums, turn them upside-down, so that they are all precariously balanced on top of one another, and then stabilise them in that position by vibrating the pivot up and down. The upshot of the theorem (which appears on the blackboard in the Steve Bell cartoon at the beginning of this article) is that the "trick" can always be done if the pivot is vibrated up and down by a small enough amount and at a high enough frequency.
Computer simulations suggested that the upside-down state could in fact be very stable indeed, and this was borne out when a colleague of mine, Tom Mullin, confirmed the theorem experimentally. The photograph below shows an upside-down 50 cm triple pendulum, with the pivot vibrating through 2cm or so at about 40 cycles per second, and the chain of pendulums is seen wobbling back towards the upward vertical after a fairly severe initial disturbance.
not quite the Indian rope trick
As soon as we started calling this gravity-defying experiment "Not Quite the Indian Rope Trick" we found that newspapers, radio and TV all began getting interested, and Tom and I have had a great deal of fun with this topic over the years. My scientific papers on the subject have even been acquired by the archives of the Magic Circle in London, which would surely have astonished a certain 10-year old boy in 1956. (The papers are kept, I understand, in a box file called Sundry Ephemera).
In the end, though, it is not all that important whether mathematics might or might not explain a particular magic trick.
What matters, surely, is the extent to which surprising results like this may help persuade the wider public that mathematics, at its best, has a certain magic of its own.
About this article
This is a shortened version of an article that appeared in the European Mathematical Society Newsletter, Issue 49, 2003.
David Acheson's latest book "1089 and All That" (Oxford University Press 2002) is an original attempt at bringing some of the ideas and pleasures of mathematics to a wide public, and is a Plus favourite. Your can read our review in issue 23 of Plus, and further details may be found at David Acheson's homepage.
Recently, David Acheson gave a lecture in Cambridge on the topics covered in this article, and more. The lecture was filmed by Science Media Network, and is available to watch online.
I tried this with 478 and it did not work. What's the problem.
Hi! starting with 478 you get 874-478=396. Then reversing 396 and adding gives 396+693=1089.
I think you thought 874 - 478 was 404! Difference between 8 and 4 in column 1 and 3, difference between 7 and 7 is zero in the middle...
I bet that's what you did...
There are conditions where it fails to work but 478 isn't one of them. :)
9x0 - 0x9 = 891 + 198 - 1089.
Read this in a book by Shalinka Devi in my teens.
She also has a great about about 1729 to blow the qubic theory. 1729 is the lowest number that is the sum of two cubes in TWO different ways.
10^3 + 9^3 = 12^3 + 1^3.
A Japanese mathematician (? Fukimara or similar) described the numbers that reappear if their digits are summed, that number reversed and those added.
1729 adds to 19; 19 times 91 is 1729, the Hardy taxi number.
Many know 91 is 3 cubed plus 4 cubed; it is also 6 cubed plus -5 cubed.
Hi Placido. I would check your maths again. I used your numbers and it worked for me.
Does Pankaj Choudhari have other examples of the save flavour, that is reaching 1089, after adding the reverse several times and finaly substracting the reverse? Thank you
it wont work if the digits are not decreasing.example is not 312 but somthing like 321
my father could also demonstrate this by algebra
Just did this with my 11 year old boy. When he calculated the answer I asked him to take his book, turn to page 108 and find line 9.
Of course I was able to recite it to him :)
Maths can be fun!
If first number is 100a + 10b + c
Second number is a+ 10b + 100c
Difference is 99( a-c)
By use of divisibility rules or by exhaustion the 99 times table (1..8) has the property that the outside digits add to 9 and the middle digit is 9
So we have a number of the form 100d+ 90 + f
Add to the digits reversed d +90 + 100f
to get 101(d+f) + 180
And since d + f = 9
The result = 909+ 180 = 1089
Note that this breaks down if a= c e.g. 414 reversed is 414 the difference is zero and digit reversal sum is also zero
The usually stated condition is that the initial three digits are different.
a sufficient but not necessary condition.
Eg. 441 -144 = 297 =99*3 etc.
No divisibility rules or 99 times table is needed for the proof.
If the number is 100a + 10b + c, and a>c then
100a + 10b + c
- 100c + 10b - a
= 100*(a-c) + (c-a) -- or, since c-a is negative
= 100*(a-c-1) + 90 + (10+c-a)
This shows that the middle digit is 9.
Then adding digits:
100*(a-c-1) + 90 + (10+c-a)
+ 100*(10+c-a) + 90 + (a-c-1)
= 1000 - 100 + 180 + 9 = 1089
Same Method is applicable for all the numbers with all ODD number of digits (digits of the number taken in decreasing order) , greater than 3 (of course). Consequently, the outcomes vary according to number of digits.
Let the number of digits be (2*N+1), where N=1,2,3,4...
Then, the corresponding magic number is given by;
If N=1; THREE digit number; 11*1*(100-1)=11*99=1089
If N=2; FIVE digit numbers; 11*10*[1000-1}=109890
Similarly for 7, 9 11, 13....
Cool. Isn't it?
Hoping that you got it,
Alanka Anil Kumar™
A most engrossing article. I wonder, if the following premise has a particular description and if anybody would be kind enough to furnish me with an explanation? In respect of the 1089 trick; I found that any number, of two or more digits (except 'mirrored' numbers such as 11 or 89,598) where at least one number is more or less than it's adjoining digits, when reversed and the lower subtracted from the higher the answer is always divisible by 9, for example:
75 - 57 = 18 = 9 x 2
9801 - 1089 = 8712 = 9 x 968
7,324,586 - 6,854,237 = 470,349 = 9 x 52,261
I have very little academic background, simply interest and curiosity and would greatly appreciate any clarification.
Thank you in advance.
Hi Mike. You might like to see this article, https://plus.maths.org/content/arithmetic-made-easy-reversible-numbers which explores what happens when you add and subtract such "reversible" pairs of numbers.
Can someone show me how this was solved. Thanks.
I think this is the problem you are referring to, as given as an example of a typical math problem.
A and B working to together can fill a cistern in 4 hours.
It takes A and C 5 hours.
B can fill the cistern twice as fast as C.
How long does it take C to fill the cistern?
Let a, b and c be the rates at which A, B and C fill the cistern. It is convenient to work with rates rather than time, because the rates can be added.
a + b =1/4
a + c = 1/5
Substitute 2c for b in the first equation. That gives two equations in a and c, which I trust you can easily solve. We end up with c=.05, a=.15 and b= .1.
c=.05=1/20, so it takes C 20 hours to fill the cistern.
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http://www.jiskha.com/display.cgi?id=1324429333
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math
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Posted by Alissa on Tuesday, December 20, 2011 at 8:02pm.
solve the inequality express in interval notation
x^4 + 4x^3 - 9x^2 - 36x < 0
- Algebra - Writeacher, Tuesday, December 20, 2011 at 8:04pm
- Alegra - Alissa, Tuesday, December 20, 2011 at 9:32pm
Ah yeah which is why I post the question.
- Alegra - Ms. Sue, Tuesday, December 20, 2011 at 9:47pm
Alissa -- Writeacher corrected your spelling of "Algebra" so that a math expert would see your post.
Jiskha doesn't have any experts in Alegra (whatever that is).
- Alegra - Steve, Wednesday, December 21, 2011 at 11:05am
x^4 + 4x^3 - 9x^2 - 36x
= x(x^3 + 4x^2 - 9x - 36)
Cubics are hard to solve, so look for easy roots. They will be factors of 36.
A little synthetic division reveals
Now since everything is single roots, the graph alternates between positive and negative between roots.
Since it's a quartic with a positive coefficient, it will be positive before the lowest root and after the highest root.
y > 0 for x < -4
y < 0 for -4 < x < -3
y > 0 for -3 < x < 0
y < 0 for 0 < x < 3
y > 0 for x > 3
- Alegra - Alissa, Wednesday, December 21, 2011 at 3:02pm
Thank you I appreciate your help and the fact that you didn't make a big issue out of a typo. Again thank you.
Answer This Question
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http://www.gatecoachingindelhi.co.in/blog/a-set-of-must-read-topics-for-gate-aspirants/
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A Set of MUST READ Topics for GATE Aspirants October 5, 2016July 5, 2017 admin GATE, Graduate aptitude test in engineering is the highly anticipated and the most difficult exam in the country. The official notification for the session 2017-18 has been released and the exam is proposed to be held in the month of February, the all India level exam is conducted by 8 IITs in collaboration with IISC Bangalore each year to test the aptitude of students in different branches of engineering, the exam is the guaranteed ticket to a secured and bright future as getting through the exam avails you lot many benefits that comprise admission to postgraduate programmes in the elite institution of the county along with fat pay scale jobs in distinctive public sector undertakings. This year the exam will be conducted by IIT Roorkee. Owing to the high difficulty level of GATE syllabus, each year lakhs of aspirants sit for the prestigious exam, yet only a few serious ones can get through it. Since the official notification is out, it is high time that candidates should kick-start their preparation. Mechanical engineering is an important paper of GATE exam. Here we list you the topics of engineering mathematics and applied mechanics and design in GATE syllabus of mechanical engineering to help you with the preparation endeavour. Engineering Mathematics Linear Algebra: Matrix algebra, systems of linear equations, eigenvalues and eigenvectors. Calculus: Functions of single variable, limit, continuity and differentiability, mean value theorems, indeterminate forms; evaluation of definite and improper integrals; double and triple integrals; partial derivatives, total derivative, Taylor series (in one and two variables), maxima and minima, Fourier series; gradient, divergence and curl, vector identities, directional derivatives, line, surface and volume integrals, applications of Gauss, Stokes and Green’s theorems. Differential equations: First order equations (linear and nonlinear); higher order linear differential equations with constant coefficients; Euler-Cauchy equation; initial and boundary value problems; Laplace transforms; solutions of heat, wave and Laplace’s equations. Complex variables: Analytic functions; Cauchy-Riemann equations; Cauchy’s integral theorem and integral formula; Taylor and Laurent series. Probability and Statistics: Definitions of probability, sampling theorems, conditional probability; mean, median, mode and standard deviation; random variables, binomial, Poisson and normal distributions. Numerical Methods: Numerical solutions of linear and non-linear algebraic equations; integration by trapezoidal and Simpson’s rules; single and multi-step methods for differential equations. Applied Mechanics and Design Engineering Mechanics: Free-body diagrams and equilibrium; trusses and frames; virtual work; kinematics and dynamics of particles and of rigid bodies in plane motion; impulse and momentum (linear and angular) and energy formulations, collisions. Strength of Materials: Stress and strain, elastic constants, Poisson’s ratio; Mohr’s circle for plane stress and plane strain; thin cylinders; shear force and bending moment diagrams; bending and shear stresses; deflection of beams; torsion of circular shafts; Euler’s theory of columns; energy methods; thermal stresses; strain gauges and rosettes; testing of materials with universal testing machine; testing of hardness and impact strength. Theory of Machines: Displacement, velocity and acceleration analysis of plane mechanisms; dynamic analysis of linkages; cams; gears and gear trains; flywheels and governors; balancing of reciprocating and rotating masses; gyroscope. Vibrations: Free and forced vibration of single degree of freedom systems, effect of damping; vibration isolation; resonance; critical speeds of shafts. Machine Design: Design for static and dynamic loading; failure theories; fatigue strength and the S-N diagram; principles of the design of machine elements such as bolted, riveted and welded joints; shafts, gears, rolling and sliding contact bearings, brakes and clutches, springs.
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http://rspa.royalsocietypublishing.org/content/204/1076/98
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math
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An account is given of a method of employing differential gas thermometers to measure the thermal conductivity of metals at low temperatures, with temperature differences of only 0$\cdot $02 degrees K in the specimen. Experimental curves are presented showing the variation of thermal conductivity with temperature between 1$\cdot $7 and 4$\cdot $3 degrees K for pure tin, alloys of tin with mercury, pure mercury, alloys of mercury with cadmium and indium, pure indium and pure tantalum, in both superconducting and normal states. The normal conductivity of strain-free specimens containing less than about 0$\cdot $1% of impurity appears to be mainly electronic, and to behave roughly in accordance with the theory of Wilson, although notable discrepancies arise in the detailed application of this theory. The ratio of superconducting to normal thermal conductivity varies with temperature roughly in the manner suggested by Heisenberg when the electrons are mainly scattered by impurities, but follows a radically different curve, for which no theoretical explanation is yet available, when lattice vibrations are the dominant scattering mechanism. For impurity contents greater than 0$\cdot $1%, or severe internal strains, the normal thermal conductivity contains an appreciable lattice component. The behaviour of the superconducting curve suggests that where crystal boundaries scatter the lattice waves, the lattice conductivity is unaltered as the metal passes from the superconducting to the normal state, but where electrons scatter the lattice waves, the lattice conductivity is reduced in this transition, possibly because of the increase in the number of scattering centres.
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| 1,689 | 1 |
http://www.voy.com/166343/9479.html
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math
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Date Posted: 18:01:59 06/30/15 Tue
Join a pageant system with a purpose! Miss Heart of Freedom in Columbus, GA.
Red, white and blue ooc only. $45 plus 10 canned goods to enter. Register at http://www.missheartoftheusa.com/muscogeecofreedom
Please put Brianna Baldwin in the box that says who can we thank for telling you about this pageant!
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s3://commoncrawl/crawl-data/CC-MAIN-2020-29/segments/1593655881763.20/warc/CC-MAIN-20200706160424-20200706190424-00546.warc.gz
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CC-MAIN-2020-29
| 631 | 10 |
https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/980784/tps7a80-vdo-question-for-tps7a8001
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math
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Other Parts Discussed in Thread: TPS74401
For the LDO dropout, we can find the Max dropout spec from datasheet.
The max dropout spec is different according to actual load current. I have a question about the LDO Vin dropout calculation. For our actual design which is shown as follow:
Vin=5.5V±3%， Vout=4.984±3.92% （the accuracy of output is calculated according to IC, external resistor accuracy）Imax of load =0.75A;
So the min Vin dropout of our design should meet: Vin dropout>350mV according to datasheet. But I have a question about the Vin dropout calculation. Please see the following calculation method:
Cal Method 1: Vin dropout=Vin(Typ)-Vout(Typ)=5.5-4.984=516mV>350mV;
Cal Method 2: Vin dropout=Vin(Typ)-Vout(Max)=5.5-5.18=320mV<350mV;
Cal Method 3: Vin dropout=Vin(Min)-Vout(Typ)=5.5*(1-3%)-4.984=351mV>350mV;
Cal Method 4: Vin dropout=Vin(Min)-Vout(Max)=5.5*(1-3%)-4.984*(1+3.92%)=155mV<350mV;
Please help to confirm which cal method is true because it is really important for our circuit design. Thanks a lot!
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s3://commoncrawl/crawl-data/CC-MAIN-2023-14/segments/1679296945279.63/warc/CC-MAIN-20230324082226-20230324112226-00200.warc.gz
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CC-MAIN-2023-14
| 1,031 | 10 |
https://la.mathworks.com/matlabcentral/answers/305207-simulink-shows-blank-diagnostic-viewer
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math
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Simulink shows blank diagnostic viewer
12 views (last 30 days)
Hi guys!! Why without even the toolbar? When I run the simulation the viewer doesn't pop up but on the bottom of the model it shows the number of errors. I was using Matlab 2015a but now I'm using Matlab 2016a and I'm facing this problem so I would like to ask if anyone know how to solve this problem.
Looking forward for you attention and thanks in advance.
More Answers (2)
omar daif on 18 Sep 2017
Hi guys, I am suffering from this problem too. I have restarted the MATLAB and it doesn't work.
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s3://commoncrawl/crawl-data/CC-MAIN-2022-33/segments/1659882573399.40/warc/CC-MAIN-20220818185216-20220818215216-00275.warc.gz
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CC-MAIN-2022-33
| 560 | 7 |
https://www.jiskha.com/display.cgi?id=1244169842
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math
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posted by <3 .
At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 25 knots and ship B is sailing north at 16 knots. How fast (in knots) is the distance between the ships changing at 6 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)
I assume you made a diagram.
let the time passed since noon be t hours
in that time ship A has traveled 25t n-miles , and ship B has traveled 16t n-miles
let the distance between them be d n-miles
I see a right-angled triangle with base of
50 + 25t, a height of 16t and a hypotenuse of d
d^2 = (50+25t)^2 + (16t)^2
at 6:00 pm, t = 6
d^2 = 221.847
2d(dd/dt) = 2(50+25t)(25) + 2(16t)(16)
so at 6:00 pm
dd/dt = [2(50+150)(25) + 2(96)(16)]/221.847
check my arithmetic
This answer isn't right either & I don't understand how you got d^2 = 221.847.
that d^2 = 221.847 was a typo
should have said d = 221.847
As you can see further down I used it as such.
Alos in my third last line of my previous post I should have divided by 2(221.847) to get
29.46 instead of 58.923
Yeah. That's better. Thanks again!
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s3://commoncrawl/crawl-data/CC-MAIN-2018-05/segments/1516084889542.47/warc/CC-MAIN-20180120083038-20180120103038-00570.warc.gz
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CC-MAIN-2018-05
| 1,072 | 22 |
http://turntoislam.com/community/threads/need-help-with-haq-meher-asap.38516/
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math
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I was wondering if anyone could help me find what the quran says about HAQ MEHER and why it is being given. it is cultural thing or islamic. about it and whow it is given but i am tring to tech someone else what it is and mean and they want me to provide evidence from the quran or a hadith. ! thank for your help!
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s3://commoncrawl/crawl-data/CC-MAIN-2020-29/segments/1593657149205.56/warc/CC-MAIN-20200714051924-20200714081924-00139.warc.gz
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CC-MAIN-2020-29
| 314 | 1 |
https://www.hackmath.net/en/examples/8th-grade-(13y)?page_num=27
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math
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Examples for 8th grade - page 27
In the first basement is more flies than the spiders, the second vice versa. Each basement had spiders and flies together 100 feet. Determine how many could be flies and spiders in the first and second basement. PS. We only need, when you write how many.
- Car inflation
About what percentage price of car increased if price rose from €1880 to €2200?
Subway train went between two stations that gradually accelerated for 26 seconds and reached a speed of 72 km/h. At this rate, went 56 seconds. Then 16 seconds slowed to a stop. What was the distance between the stations?
- Hurry - rush
At an average speed 7 km/h I will come from the school to the bus stop for 30 minutes. How fast I need to go if I need to get to the bus stop in 21 minutes?
Everyone complains about the lack of money. In fact, there is no shortage of money, but the relative scarcity of goods and things that people buy for money. Calculate what percentage of the price of all goods and services rose immediately, if everyone has
- Earth's diameter
The Earth's diameter on the equator is approximately 12750 km. How long does the Gripen flyover the Earth above the equator at 10 km if it is at an average speed of 1500 km / h?
Determine the side of diamond if its content is S = 353 cm2 and one diagonal u2 = 45 cm.
- Trapezoid ABCD v2
Trapezoid ABCD has length of bases in ratio 3:10. The area of riangle ACD is 825 dm2. What is the area of trapezoid ABCD?
Calculate the sides of the triangle if its area S = 630 and the second cathethus is shorter by 17.
- Three digits number
How many are three-digit integers such that in they no digit repeats?
- Isosceles trapezoid
The lengths of the bases of the isosceles trapezoid are in the ratio 5:3, the arms have a length of 5 cm and height = 4.8 cm. Calculate the circumference and area of a trapezoid.
- Sun rays
If the sun's rays are at an angle 60° then famous Great Pyramid of Egypt (which is now high 137.3 meters) has 79.3 m long shadow. Calculate current height of neighboring chefren pyramid whose shadow is measured at the same time 78.8 m and the current hei
- Motor physics
Car traveling at 130 km/h on the highway. Pulling power of the motor is 8 kN. Determine engine power in kW.
- Metal alloy
What is the ratio of metals in the alloy that is in the 50 tonnes of steel to 30 kg nickel?
- Trapezoid RT
The plot has a shape of a rectangular trapezium ABCD, where ABIICD with a right angle at the vertex B. side AB has a length 36 m. The lengths of the sides AB and BC are in the ratio 12:7. Lengths of the sides AB and CD are a ratio 3:2. Calculate consumptio
Sisters Hanka and Vera goes mostly tograndmother by bicycle. Journey took Hanka 30 minutes and Vera 20 minutes. How long will Vera catch up with Hanka when started from home five minutes later than Hanka?
- Liters in cylinder
Determine the height at which level 24 liters of water in a cylindrical container having a bottom diameter 36 cm.
- Pure quadratic equation
Solve pure quadratic equation ?.
The baker makes from 10 kg of flour 12 kg dough. How much flour he need to make a 100 kg dough?
The volume of the cuboid is 245 cm3. Each cuboid edge length can be expressed by a integer greater than 1 cm. What is the surface area of the cuboid?
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s3://commoncrawl/crawl-data/CC-MAIN-2018-13/segments/1521257647003.0/warc/CC-MAIN-20180319155754-20180319175754-00672.warc.gz
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CC-MAIN-2018-13
| 3,271 | 33 |
http://mymathforum.com/elementary-math/340055-cost-fuel-canadian-dollars.html
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math
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|April 15th, 2017, 01:40 PM||#1|
Joined: Apr 2017
Cost of Fuel in Canadian Dollars
I'm looking to do some costing on driving a circle around the United States. I'm not great at math, so I'm looking for help. Here are my numbers:
I drive a truck with approximately a 16L/100KM (urban) fuel economy, and I'm looking at driving a rough total of 22,000KM (13,700M) trip through the United States. I'm accounting for conversion of metric to standard and CAD to USD.
Fuel economy: 16L/100KM
Average price per litre: 1.73USD
Conversion $ USD/CAD: 1.33
22000/100*16*1.73*1.33 = ~$8,100CAD.
Have I done this correctly?
Last edited by skiprichard; April 15th, 2017 at 02:13 PM. Reason: Poor formatting.
|April 15th, 2017, 01:59 PM||#2|
Joined: Jul 2011
Close enough based on your figures ... I think your estimate of gas price at 1.73 USD per liter is a bit high. Highest cost these days is a bit above \$3.00 per gallon in California which is about \$0.80 per liter $\approx$ 1.06 CAD.
Of course, Trump's recent bellicose actions in the Middle East and elsewhere tends to make the cost of oil go up, so your estimate might not be that far off in the next few months.
|April 15th, 2017, 06:53 PM||#4|
Joined: Aug 2011
Can we also research for additional automobile fuels manufacturing than Gasoline (Petrol,Diesel) & CNG?
Thanks & Regards,
Prashant S Akerkar
|April 15th, 2017, 07:28 PM||#5|
Joined: Jul 2011
|April 18th, 2017, 02:15 PM||#7|
Joined: Jan 2014
From: The backwoods of Northern Ontario
Here's a useful formula for converting litres per 100 km to miles to a Canadian gallon.
282.48 ÷ (L/100 km) = miles per gallon
However a U.S. gallon is about five sixths of a Canadian gallon. So to convert litres per 100 km to miles to a U.S. gallon, use this formula instead.
235.22 ÷ (L/100 km) = miles per gallon
Last edited by Timios; April 18th, 2017 at 02:18 PM.
|canadian, cost, dollars, fuel|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Calculating fuel cost||zudecke||Algebra||6||January 19th, 2016 02:08 PM|
|A manufacturer can produce daily x items at a cost of C dollars||isimeone||Calculus||1||November 22nd, 2014 07:26 AM|
|Fuel Cost (Race Car Problem)||mathkid||Calculus||1||December 15th, 2012 01:37 PM|
|Dollars problem||linhbui||Elementary Math||4||August 24th, 2012 01:18 AM|
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s3://commoncrawl/crawl-data/CC-MAIN-2017-17/segments/1492917121153.91/warc/CC-MAIN-20170423031201-00088-ip-10-145-167-34.ec2.internal.warc.gz
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CC-MAIN-2017-17
| 2,294 | 36 |
https://www.witpress.com/elibrary/wit-transactions-on-modelling-and-simulation/44/17651
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math
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Time And Space Derivatives In A BEM Formulation Based On The CQM With Initial Conditions Contribution
Free (open access)
A. I. Abreu, M. A. C. Ferro & W. J. Mansur
This work is concerned with the numerical computation of time and space derivatives of the time-domain solution of scalar wave propagation problems using the boundary element method (TD-BEM). In the present formulation, the BEM based on the so-called convolution quadrature method (CQM-BEM) is employed. The CQM-BEM takes into account non-homogeneous initial conditions by means of a general procedure, known as the initial condition pseudo-force procedure (ICPF), which replaces the initial conditions by equivalent pseudo-forces. The boundary integral equation with initial conditions contribution is derived analytically and the quadrature weights of the standard ICPF-CQM-BEM formulation are transformed in order to compute time and space derivatives. Two numerical examples are presented at the end of the work illustrating the efficacy of the implemented formulation. Keywords: wave equation, time and space derivatives, boundary element method, convolution quadrature method, initial condition pseudo-force procedure. 1 Introduction This work presents an application of a time-domain boundary element method (TD-BEM) for the analysis of scalar wave propagation problems. The TD-BEM employs the convolution quadrature method (CQM) developed by Lubich [1, 2]. In the CQM, fundamental solutions in the Laplace transformed-domain are considered and a numerical approximation of the basic integral equations of the
wave equation, time and space derivatives, boundary element method, convolution quadrature method, initial condition pseudo-force procedure.
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s3://commoncrawl/crawl-data/CC-MAIN-2020-40/segments/1600400245109.69/warc/CC-MAIN-20200926200523-20200926230523-00219.warc.gz
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CC-MAIN-2020-40
| 1,721 | 5 |
http://gimnazjum6.net/history-of-z-could-it-just-for-kids/
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math
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History of mathematics is beneficial for your little one
It is crucial until we can understand the mathematics that people need, to know about the foundation of math. It is of the utmost importance to get into a routine and to understand the fundamentals just before we begin to engage in with the mathematics games. When mathematics is being done by us , we have to bear in mind the basics so http://www.semantics-blog.com/historical-greek-mathematics-whats-unmasked-4/ that we can find quickly.
X y we understand when you would like to engage in with the math games although can be rather helpful for individuals in activity, we will want certainly to know some basic points about it. Math is the terminology of their mind. If we want to use it in our 15, we must be familiarized with this. We aren’t able to learn something by the way we can do it we will never be able to use it when we absolutely need it.
It could not be accepted by us, if a mathematician claimed something very wrong check my reference in his mathematics. Though we’ve got different understandings regarding mathematics, we’re united from the name we call it. It is not easy when we have been chatting about the history of mathematics, to distinguish between wrong and right.
As soon as we say mathematics we signify it comprises every thing which we can view in the culture that are connected with it and a given period of time. Math’s history can educate us the basics of the maths that are what we want to master to utilize inside our lives.
As soon as we have heard some matters we may put it to use in order to greatly simply help us fix the problems that we see inside our lives. This could be math’s history which we learn. We could understand the history of math to know the steps that lead us into the solution of our problems.
History of mathematics gives us an insight into their human race’s history. We are able to know from the past, the way that it is possible to overcome challenges we https://paramountessays.com/ confront. Heritage of math has served people live throughout the ages also it’ll allow them to perform the same thing later on.
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One particular essential matter to stay in mind is the fact that you are. It’s essential that people put in an attempt to know about that the foundation of mathematics because it may assist individuals. We can’t afford to throw away our time. It is far superior to be at a routine also to find the fundamentals to begin off with before we proceed to more complicated mathematics.
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When we have find out concerning the foundation of math we are aware it isn’t tough to comprehend. As soon as we understand the foundation of math, we are ready to utilize it. We could learn it to ensure that individuals are able to fix the issues we see inside our own lives.
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s3://commoncrawl/crawl-data/CC-MAIN-2020-29/segments/1593657176116.96/warc/CC-MAIN-20200715230447-20200716020447-00210.warc.gz
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CC-MAIN-2020-29
| 3,897 | 13 |
https://solvedlib.com/n/20-points-show-that-for-all-odd-natural-numbers-n-a-n-the,8142227
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math
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Okay, We've got now here and squared minus end. Plus 41 is going to be odd. Okay, So that, uh, very nice and good statement whatever. Let's make sure that we can solve one correctly. Make sure that's odd so that we could even possibly do.
Induction on this. We have one squared, minus one plus 41. Okay, so one minus 10 plus 41 is zero. I believe they like we chose 41 because it is an odd number. Maybe it was a large number.
Just who knows why? We'll see. Maybe if there is a reason for that P of K, then we'll assume that this is going to be odd. Okay, we assumed that. Now, let's see with p K. Plus one now, general, things I'm doing, I'm probably going to try to get this term back at some point.
And then hopefully another term. Like if I can get K squared minus one in there, any of square number. Oh, that's rewrite that to K minus one. That's always odd, right? So if we can get maybe some combination of this and this we that might work, but let's go ahead and start working and see what comes up. Um, so for of the K plus one, we've got capers, one squared, minus K close one.
Plus, we erase that. You don't need that. Plus 41 right? I'll just go ahead and fact foil of these Minus came on this one plus 41. Okay, he has, uh Well, we've got the K squared minus K plus 41 at least. So that's right.
That may be on the right side. Two K plus one minus one. That's Ah, that's zero. So we can right here, K squared, minus K plus 41. We know that is on.
All right. Here we go. Yeah, that's nice. Okay, So, um, let's say that we take any odd number and we added to an even number. Right? Then the resultant will always the result will always be odd, right? So here we we actually have proved it just like that.
We're able to say to K is always even because it's even means divisible by two. And we have a two as a multiple active factor.
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s3://commoncrawl/crawl-data/CC-MAIN-2022-49/segments/1669446711637.64/warc/CC-MAIN-20221210005738-20221210035738-00520.warc.gz
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CC-MAIN-2022-49
| 1,842 | 8 |
https://www.davidsheard.co.uk/copy-of-research-interests
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math
|
Here are some selected publications
Nielsen equivalence in Coxeter groups (in preparation).
Group invariant machine learning through near-isometries, joint with Benjamin Aslan and Daniel Platt (in preparation)
Group invariant machine learning through near-isometries, joint with Benjamin Aslan and Daniel Platt, exhibited as part of the Data Science Virtual Poster Competition 2020 hosted by Imperial College London.
Here is a list of some academic talks I have given in the past.
CUTTING UP SURFACES AND COMMUTATORS IN FREE GROUPS
Warwick DAGGER seminar 13th Jan 2020
Bristol junior geometry seminar 5th Nov 2019
UCL/KCL junior geometry seminar 10th Oct 2019
When is an element g in a group G a product of commutators [a,b]? What is the minimal number of commutators n such that g=[a_1,b_1]...[a_n,b_n]? What are all possible solutions (a_1,b_1,...,a_m,b_m) to the equation
g=[a_1,b_1]...[a_m,b_m]? Very difficult, yet important, questions - but ones whose answers seem to lie in the darkest recesses of combinatorial group theory. Not so! At least for G a free group, these questions can all be answered elegantly and beautifully by cutting up and colouring surfaces. In this talk I shall present solutions to these problems with an emphasis on drawing nice pictures.
THE TOPOLOGY OF KNOTS AND SURFACES
UCL undergraduate colloquium 13th Nov 2019
Topology, or the mathematical study of the shape of things, is one of the most important areas of mathematics, underpinning, aiding, or influencing a diverse range of modern mathematics including geometry, number theory, combinatorics and group theory. It even has applications to quantum mechanics, molecular biology, and computer science. This talk will be a whistle stop tour of some 1 and 2 dimensional topology, including knots and links, Seifert surfaces, polygonal complexes and Euler characteristic, and finishing off with the classification of compact surfaces. - Oh, and the best part? There will be lots of pictures!
CAN FORGETFUL COMPUTERS DO GROUP THEORY?
UCL postgraduate seminar 25th Apr 2019
In 1931 Gödel proved that there were problems in mathematics which can never be solved...fiddlesticks! To add insult to injury in 1936 Church and Turing independently showed that even among those problems which are solvable, there are some which take an infinite amount of time to solve algorithmically...double-fiddlesticks!! Since this time, questions of computability (decision problems) have entered all corners of mathematics, some of the most well-known being posed by Dehn: the word, conjugacy, and isomorphism problems in group theory. I shall introduce a model for a particularly stupid type of computer (a Turing machine with no memory) called a finite state automaton, and discuss whether such computers can do group theory. If/when they can, I'll discuss how they can help solve some of Dehn's decision problems.
AN INTRODUCTION TO GEOMETRIC GROUP THEORY WITH APPLICATIONS TO ACCESSIBILITY
UCL/KCL junior geometry seminar 8th Nov 2018
Geometric group theory aims to study groups using tools from geometry and topology, more precisely to study finitely generated groups by looking at the way they act on geometric and topological spaces. In this talk I shall introduce some of the aims of geometric group theory, and construct a well-known space associated to a finitely presented group. I will talk about algebraic splittings of groups in the sense of van Kampen's Theorem, and finish by sketching the proof of Dunwoody's theorem that finitely presented groups admit only a finite number of such splittings over finite subgroups.
THE DUALITY BETWEEN THE COMBINATORICS AND THE GEOMETRY OF COXETER GROUPS
UCL/KCL junior geometry seminar 2nd Nov 2017
Coxeter groups, or groups generated by reflections which act discretely, arise naturally as the symmetry groups of regular polytopes and periodic tilings. They are typically studied from one of two viewpoints. From the point of view of geometry they give rise to nice simplicial structures which are very important in the study of Lie groups and Lie algebras. On the other hand, thought of as combinatorial groups, they admit a simple constructive solution to the word problem, as well as a solution to the conjugacy problem. I will introduce the basics of both of these approaches and show how the algebraic structure of the group is encoded into the geometry, and illustrate how this can dramatically simplify proofs of combinatorial results, as well as giving us a geometric solution to the word problem.
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s3://commoncrawl/crawl-data/CC-MAIN-2022-21/segments/1652662534669.47/warc/CC-MAIN-20220520191810-20220520221810-00330.warc.gz
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CC-MAIN-2022-21
| 4,524 | 23 |
https://space.stackexchange.com/questions/39413/inclination-maneuvers-for-geo-satellites/52489
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math
|
I was wondering about the orbital location to perform inclination nulling maneuvers for GEO satellites.
I know from basic astrodynamics that the best place to perform inclination correction is at the line of nodes.
However, for GEO satellites, according to the Handbook for Geostationary Orbits by E. M. Soop, (google books) the best place to perform those maneuvers is around the inertial +/- Y axis (90 and 270 deg from vernal equinox). I read his explanation but still cannot understand why there is better than the LON.
In the book circa chapter 6, page 147, Soop mentions that:
... the perturbing forces act on the orbit inclination with a north acceleration when the spacecraft is near the +y axis and a south acceleration near the -y axis. The mean direction of the drift vector di/dt is then approximately in the +x direction... To compensate for the perturbations, the inclination station keeping maneuvers then have to be given as south thrusts near the +y axis i.e. a sidereal angle of 90 deg or as north thrusts when the spacecraft is near a sidereal angle of 270 deg. Since the sidereal angle of the thrust is approximately given, the time of day of the thrust must be selected according to the time of year. The local time, at the spacecraft longitude, is given by the following table.
North Thrust South Thrust Spring Morning Evening Summer Midnight Noon Autumn Evening Morning Winter Noon Midnight
To clarify, I'm talking about practical cases in which there is a Line Of Nodes since there is a small inclination to the satellite. I don't talk about the academic ideal case where the GEO inclination is zero.
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s3://commoncrawl/crawl-data/CC-MAIN-2023-50/segments/1700679100551.17/warc/CC-MAIN-20231205105136-20231205135136-00601.warc.gz
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CC-MAIN-2023-50
| 1,624 | 7 |
https://kitabrabta.com/school/not-specified-school/nursery
|
math
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Your Cart is empty
Books are a uniquely portable magic - Stephen King
You can Buy NURSERY BOOKS of NOT SPECIFIED SCHOOL from Kitabrabta. You can buy all of them in bundle or you can buy a single book of any class.
Rs: 109 Rs:80
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s3://commoncrawl/crawl-data/CC-MAIN-2023-50/segments/1700679100309.57/warc/CC-MAIN-20231202010506-20231202040506-00176.warc.gz
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CC-MAIN-2023-50
| 291 | 6 |
https://www.ipht.fr/en/Phocea/Vie_des_labos/Seminaires/index.php?id=992722
|
math
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Large deviation theory in statistical physics
CMAP, Ecole polytechnique
Tue, Dec. 09th 2014, 11:00
Salle Claude Itzykson, Bât. 774, Orme des Merisiers
Large deviation theory made its way into statistical physics in the 1970s and 80s as a mathematical framework for studying equilibrium systems, and is now increasingly used for studying nonequilibrium systems driven in steady states. In this talk, we will review some aspects of the large deviation theory and discuss recent applications to nonequilibrium statistical mechanics.
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s3://commoncrawl/crawl-data/CC-MAIN-2021-43/segments/1634323585911.17/warc/CC-MAIN-20211024050128-20211024080128-00501.warc.gz
|
CC-MAIN-2021-43
| 530 | 5 |
https://www.physicsforums.com/threads/magnetic-field-using-the-biot-savart-law.300479/
|
math
|
1. The problem statement, all variables and given/known data A small current element at the origin has a length of 2.0mm and carries a current of 2.0A in the +z direction. Find the magnitude and direction of the magnetic field due to this current element at the point (0,3.0m,4.0m). 2. Relevant equations Biot-Savart Law: dB=(mu/4pi)(Idl cross r(hat))/(r^2) 3. The attempt at a solution I attemped the problem by integrating the biot-savart law holding everything constant except for dl. However, this does not give me the correct answer, which by the way is -9.6pT in the +i direction.
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s3://commoncrawl/crawl-data/CC-MAIN-2018-30/segments/1531676590169.5/warc/CC-MAIN-20180718115544-20180718135544-00510.warc.gz
|
CC-MAIN-2018-30
| 586 | 1 |
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a57e52c4261a11ed5a488f77a25e8c74
|
math
|
Noise robust integration for blind and non-blind reverberation time estimation
Conference object, Preprint
- Publisher: KTH, Signalbehandling
Computer Science - Sound | blind estimation | backward integration | Reverberation time estimation | decay rate estimation
The estimation of the decay rate of a signal section is an integral component of both blind and non-blind reverberation time estimation methods. Several decay rate estimators have previously been proposed, based on, e.g., linear regression and maximum-likelihood estimation. Unfortunately, most approaches are sensitive to background noise, and/or are fairly demanding in terms of computational complexity. This paper presents a low complexity decay rate estimator, robust to stationary noise, for reverberation time estimation. Simulations using artificial signals, and experiments with speech in ventilation noise, demonstrate the performance and noise robustness of the proposed method.
<p>QC 20150811. QC 20160216</p>
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s3://commoncrawl/crawl-data/CC-MAIN-2018-43/segments/1539583512395.23/warc/CC-MAIN-20181019103957-20181019125457-00129.warc.gz
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CC-MAIN-2018-43
| 986 | 6 |
https://1-hour-signs.ca/forum/l3wiu.php?id=integration-by-substitution-203a56
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math
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(Well, I knew it would.). To perform the integration we used the substitution u = 1 + x2. In this method of integration by substitution, any given integral is transformed into a simple form of integral by substituting the independent variable by others. We can use this method to find an integral value when it is set up in the special form. To understand this concept better, let us look into the examples. In calculus, Integration by substitution method is also termed as the “Reverse Chain Rule” or “U-Substitution Method”. Your email address will not be published. This integral is good to go! In the equation given above the independent variable can be transformed into another variable say t. Differentiation of above equation will give-, Substituting the value of (ii) and (iii) in (i), we have, Thus the integration of the above equation will give, Again putting back the value of t from equation (ii), we get. The integration of a function f(x) is given by F(x) and it is represented by: Here R.H.S. The substitution method (also called [Math Processing Error]substitution) is used when an integral contains some function and its derivative. By setting u = g(x), we can rewrite the derivative as d dx(F (u)) = F ′ (u)u ′. Among these methods of integration let us discuss integration by substitution. ∫sin (x3).3x2.dx———————–(i). Provided that this final integral can be found the problem is solved. C is called constant of integration or arbitrary constant. Take for example an equation having an independent variable in x, i.e. The Substitution Method. Now, substitute x = g (t) so that, dx/dt = g’ (t) or dx = g’ (t)dt. of the equation means integral of f(x) with respect to x. Then du = du dx dx = g′(x)dx. Integration by substitution, it is possible to transform a difficult integral to an easier integral by using a substitution. This is the required integration for the given function. F(x) is called anti-derivative or primitive. Consider, I = ∫ f (x) dx. To learn more about integration by substitution please download BYJU’S- The Learning App. Required fields are marked *. When we can put an integral in this form. Just rearrange the integral like this: (We can pull constant multipliers outside the integration, see Rules of Integration.). Doing so, the function simplifies and then the basic formulas of integration can be used to integrate the function. It means that the given integral is of the form: Here, first, integrate the function with respect to the substituted value (f(u)), and finish the process by substituting the original function g(x). But this method only works on some integrals of course, and it may need rearranging: Oh no! Our perfect setup is gone. We can use this method to find an integral value when it is set up in the special form. In calculus, the integration by substitution method is also known as the “Reverse Chain Rule” or “U-Substitution Method”. "Integration by Substitution" (also called "u-Substitution" or "The Reverse Chain Rule") is a method to find an integral, but only when it can be set up in a special way. We might be able to let x = sin t, say, to make the integral easier. Substituting the value of 1 in 2, we have. The first and most vital step is to be able to write our integral in this form: Note that we have g (x) and its derivative g' (x) It is 6x, not 2x like before. Once the substitution was made the resulting integral became Z √ udu. Substituting the value of (1) in (2), we have I = etan-1x + C. This is the required integration for the given function. Your email address will not be published. Here f=cos, and we have g=x2 and its derivative 2x This method is also called u-substitution. The General Form of integration by substitution is: ∫ f(g(x)).g'(x).dx = f(t).dt, where t = g(x). In this case, we can set [Math Processing Error] equal to the function and rewrite the integral in terms of the new variable [Math Processing Error] This makes the integral easier to solve. In the general case it will become Z f(u)du. When our integral is set up like that, we can do this substitution: Then we can integrate f(u), and finish by putting g(x) back as u. Integrate 2x cos (x2 – 5) with respect to x . Let’s learn what is Integration before understanding the concept of Integration by Substitution. Integration Using Substitution Integration is a method explained under calculus, apart from differentiation, where we find the integrals of functions. The first and most vital step is to be able to write our integral in this form: Note that we have g(x) and its derivative g'(x). We know (from above) that it is in the right form to do the substitution: That worked out really nicely! The anti-derivatives of basic functions are known to us. Usually the method of integration by substitution is extremely useful when we make a substitution for a function whose derivative is also present in the integrand. But this integration technique is limited to basic functions and in order to determine the integrals of various functions, different methods of integration are used. According to the substitution method, a given integral ∫ f (x) dx can be transformed into another form by changing the independent variable x to t. This is done by substituting x = g (t). Since du = g ′ (x)dx, we can rewrite the above integral as In calculus, the integration by substitution method is also known as the “Reverse Chain Rule” or “U-Substitution Method”.
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s3://commoncrawl/crawl-data/CC-MAIN-2021-04/segments/1610704847953.98/warc/CC-MAIN-20210128134124-20210128164124-00095.warc.gz
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CC-MAIN-2021-04
| 6,350 | 2 |
https://www.squeaktime.com/blog/math-circles
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math
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In the book, the author aims to find out how and what to teach small children, but the questions he asks (and tries to answer) are hugely relevant for teachers of children of all ages. He is extremely honest when reflecting on what worked and what didn't, and there are moments of true joy and despair (here is a typical section). It is a beautifully written book, and contains a great deal of insight into the teaching of maths.
The book also contains a number of extremely creative and interesting ideas for teaching that would be suitable for KS1-3, and could be adapted for older students. Here is a typical 'game':
One of the boys (the 'executioner') leaves the room, while the other one (the 'condemned') gets 4 white and 4 black balls. He then distributes them into two boxes any way he wants. The executioner comes back, randomly selects a box, and draws a ball from it (also at random). A black ball means death and a white means freedom.
What is the optimal strategy? What is the probability of freedom?
15 chairs are placed around a circular table. On the table are name cards for 15 guests. After the guests sit down, it turns out that none of them are sitting in front of their own card. Prove that the table can be rotated so that at least 2 guests are correctly seated.
Can you see how to solve this problem? [Hint: use the pigeonhole principle]
Apart from the rich mathematical ideas at play, this book has inspired me to make a new year's resolution: to create a maths circle for the schools in London... Any London teachers reading this: if you're interested in setting up a maths circle, let me know!
Basil has a plastic triangle with 30, 60 and 90 degree angles and no marks on it. He can trace the triangle, or he can place a part of or an entire side of the triangle along a previously drawn line and trace the other sides of the triangle. He needs to draw a 15 degree angle. How can this be done with only the triangle?
A circle has been coloured with two colours. Prove that there will be three points of the same colour that form an isosceles triangle.
Can you solve it? Is the same true with three colours? Does it have to be a circle? Why an isosceles triangle - will there be an equilateral triangle?
Here is an example question:
Four grasshoppers sit at the vertices of a square. Every now and then, one of them hops over another, landing at a point symmetric, with respect to the jumped-over grasshopper, to where it jumped from [i.e. it jumps the same distance and direction to and from the jumped-over grasshopper]. Prove that at no time can the grasshoppers occupy the vertices of a bigger square than the original one.
If this hasn't driven you mad enough, try this similar problem that springs to mind:
Three frogs are placed on three vertices of a square. Every minute, one frog leaps over another frog, in such a way that the "leapee" is at the midpoint of the line segment whose endpoints are the starting and ending position of the "leaper." Will a frog ever occupy the vertex of the square that was originally un-occupied?
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s3://commoncrawl/crawl-data/CC-MAIN-2019-26/segments/1560627998238.28/warc/CC-MAIN-20190616122738-20190616144738-00283.warc.gz
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CC-MAIN-2019-26
| 3,062 | 14 |
https://www.eeeguide.com/impedance-diagram/
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math
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Impedance Diagram is a complex quantity having real and imaginary parts; where the real part is the resistance and the imaginary part is the reactance of the circuit.
Consider the RL series circuit shown in Fig. 5.1. If we apply the real function Vm cos ωt to the circuit, the response may be Im cos ωt. Similarly, if we apply the imaginary function jVm sin ωt to the same circuit, the response is jIm sin ωt. If we apply a complex function, which is a combination of real and imaginary functions, we will get a complex response.
This complex function is Vm ejωt = Vm(cos ωt + j sin ωt).
Applying Kirchhoff s law to the circuit shown in Fig. 5.1,
The solution of this differential equation is
By substituting i(t) in the above equation, we get
Impedance is defined as the ratio of the voltage to current function
Complex impedance is the total opposition offered by the circuit elements to ac current, and can be displayed on the complex plane. The impedance is denoted by Z. Here the resistance R is the real part of the impedance, and the reactance XL is the imaginary part of the impedance. The resistance R is located on the real axis. The inductive reactance XL is located on the positive j axis. The resultant of R and XL is called the complex impedance.
Figure 5.2 is called the impedance diagram for the RL circuit. From Fig. 5.2, the impedance Z = √R2 +(ωL)2, and angle θ = tan–1 ωL/R. Here, the impedance is the vector sum of the resistance and inductive reactance. The angle between impedance and resistance is the phase angle between the current and voltage applied to the circuit.
Similarly, if we consider the RC series circuit, and apply the complex function Vm ejωt to the circuit in Fig. 5.3, we get a complex response as follows.
Applying Kirchhoff’s law to the above circuit, we get
Solving this equation we get,
Here impedance Z consists of resistance (R), which is the real part, and capacitive reactance (XC = 1/ωC), which is the imaginary part of the impedance. The resistance,R, is located on the real axis, and the capacitive reactance XC is located on the negative j axis in the impedance diagram in Fig. 5.4.
Form Fig. 5.4, impedance Z = √R2 + X2C or √R2 + (1+ωC)2 and angle θ = tan-1 (1/ωCR). Here, the impedance, Z, is the vector sum of resistance and capacitive reactance. The angle between resistance and impedance is the phase angle between the applied voltage and current in the circuit.
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s3://commoncrawl/crawl-data/CC-MAIN-2023-50/segments/1700679100484.76/warc/CC-MAIN-20231203030948-20231203060948-00621.warc.gz
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CC-MAIN-2023-50
| 2,445 | 14 |
http://www-cs-students.stanford.edu/~mogens/best.usenet.html
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math
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[email protected]) sent me the following, which he swears was an exchange between an anonymous Supplicant and the Oracle. You be the judge. :)
The Usenet Oracle has pondered your question deeply. Your question was:
> (Grovel grovel, posture, whine grovel grovel whine whimper praise praise > grovel grovel, ect.) > > What is the preferred style of unarmed combat used by lemurs?And in response, thus spake the Oracle:
} Article: 5750 of news.admin.misc } From: [email protected] (The Usenet Oracle) } Newsgroups: news.admin.misc } Subject: Attempted lemur takeover of rec.humor.oracle } Date: 20 Nov 1993 23:57:58 GMT } } Okay, folks. Those goons from alt.fan.lemurs are trying to take over } rec.humor.oracle again. They've been mailbombing me all week with } questions about lemurs; it seems that Joel Furr got some statistician } at the Duke University Primate Center to work out just how many lemur } questions it would take to insure that at least half of each r.h.o } Digest would refer to lemurs. } } Newsadmins who are, shall we say, not overfond of high-voltage } spikes, may want to consider dropping a.f.l from their news servers } at once. } -- } The Usenet Oracle * [email protected] * Serving the Net since 1989 } "And the Sibyl with raving mouth, uttering words solemn, unadorned, } and unsweetened, reaches with her voice a thousand years because of } the god in her." --Heraclitus, frag. 12
} Article: 5751 of news.admin.misc } From: [email protected] (Dave Hayes) } Newsgroups: news.admin.misc } Subject: Re: Attempted lemur takeover of rec.humor.oracle } Date: 21 Nov 1993 01:12:15 GMT } } Ha! So the Oracle reveals his true authoritarian colors! Seems to } me lemurs have as much right as anyone to post questions wherever } they want! } } When an all-powerful Oracle stoops to forming a cabal to suppress a } few admirers of fuzzy lower primates, well... can you say, "Death of } Usenet"? :)
} From: [email protected] (Richard E. Depew) } Newsgroups: news.admin.misc } Subject: Re: Attempted lemur takeover of rec.humor.oracle } } Orrie, not to worry. Retroactive moderation will automatically tag } all postings by lemurs and transfer them to a Gopher server on Baffin } Island that operates only between 2300 and 2400 GMT, that is when } there's kerosene in the generator to run the Mac Classic. Of course } anyone is free to download them from the server once they're there. } } I think you'll be pleased with the results.
} From: [email protected] (Serdar Argic) } Newsgroups: talk.politics.mideast,talk.politics.soviet,soc.culture.greek, } soc.culture.europe,soc.history,soc.culture.soviet,soc.culture.turkish, } soc.culture.iranian,news.admin.misc,alt.fan.lemurs,rec.humor.oracle.d } Distribution: world } Subject: Re: Attempted lemur takeover of rec.humor.oracle } } Oracle simply exposes the x-Soviet Armenian Government-paid Lemur } crooks/criminals and their well-known forgeries in public. Remember } that x-Soviet Armenia, employing Lemur moronians, attempts to call } into question the veracity of the Oracle Holocaust. X-Soviet Armenia } has also implemented state-sponsored terrorism through Lemurs in } an attempt to silence the Turkish people's vehement demands and } protests.
} } From: [email protected] (Cheyne l'Etre) } Newsgroups: news.admin.misc } Subject: MAKE MONEY FAST } } If you're curious, take a second and read this... } } Dear Friend, } } My name is Dave Rhodes. In September 1988, my lemur was } repossesed, and the bill collectors were hounding me like you } wouldn't believe. I was laid off, and my unemployment checks had } run out. The only escape I had from the pressure of failure was } my computer and my modem. } } This past St. Swithin's day, my family and I toured our fifty-acre } lemur farm in our shiny new Lincoln Town Car that I bought for } CASH. You too can be RICH beyond your wildest dreams. } } INSTRUCTIONS: Send e-mail to "[email protected]" with the } Subject: line "give me". On the first line of your message, specify } the exact dollar amount you wish to realize your heart's desire. } Within five weeks a representative of the United States Postal } Service will be ringing at YOUR doorbell with $10,000--$50,000-- } $1,000,000 (One Million Dollars)! Please note, this is entirely } legal, since you are just ASKING for the money!
} From: [email protected] (Kit Parker) } Newsgroups: alt.sex.bestiality, news.admin.misc } Subject: I Like Big Hairy Lemurs } } Hi Im Kit an RA in Parrish Hall at Swarthmore. the very thought of a } naked furry lemur makes me horny, does anyone know where I can find } one in the Philadelphia area Thanks oops he's coming back to the } term room
} From: Shandra DeWitt
} Newsgroups: news.admin.misc } Subject: Dying Boy Needs Lemurs } } My friend said you are the people who run the USnet bulletin board so } would you please post this Urgent Information on your BBS. } } In a hospital in Sussex, England, there is a twelve-year-old boy who } is dying of an inoprable brain tumor. His one wish is to enter the } Guiness Book of Records for owning more lemurs than anyone. His name } is ^Z
} From: [email protected] (Brian Reid) } Newsgroups: news.admin.misc } Subject: Death of Usenet (Was: Attempted lemur takeover...) } } I give up. They were right. Usenet has had it. } } Orrie, the Cabal have decided. We're turning the whole thing over to } you. You won't have to worry about lemur invasions in r.h.o when } you're . . . Usenet Supermoderator! Right: we all agreed no one was } better suited for the job. You can read 10Mbytes of postings in a } nanosecond and save out the two or three that deserve distribution. } You can send flaming death to people who post child pornography on the } K12 groups and quote too many lines in followups. You can get rid of } the entire Usenet hierarchy and restore net.general, where the dozen } or two of us who have anything worth saying can reign in peace. } } Here's to You and Usenet Utopia!
Joel Furr(ian): Armenian crook/criminal/wacko, Big Kahuna of alt.fan.lemurs,
Moderator of alt.folklore.suburban and comp.society.folklore, Co-Moderator of soc.history.war.world-war-ii, and purveyor of cool net.collectibles. Will create newsgroups for food. Order your Green Card Lawyers shirt today.
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s3://commoncrawl/crawl-data/CC-MAIN-2020-50/segments/1606141196324.38/warc/CC-MAIN-20201129034021-20201129064021-00435.warc.gz
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CC-MAIN-2020-50
| 6,310 | 14 |
https://web2.0calc.com/questions/an-air-conditioning-system-can-cirulate-470-cubic
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math
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An air conditioning system can cirulate 470 cubic feet of air per minute how many cubic yards of air can it cirulate per minute
I do not know how to put this equation into calculator
Enter 470/27 into the calculator. You should get 17.41 yards/minute. If using sig fig rules, you should get 17 yards/minute.
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s3://commoncrawl/crawl-data/CC-MAIN-2020-24/segments/1590347406785.66/warc/CC-MAIN-20200529214634-20200530004634-00427.warc.gz
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CC-MAIN-2020-24
| 307 | 3 |
https://www.ophth.wisc.edu/blog/2006/12/01/factors-affecting-outflow-facility-calculations/
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math
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Author(s): Tian B, Hu Y, Gabelt BT, Kaufman PL. Factors affecting outflow facility calculations. Exp Eye Res. 2006 Dec;83(6):1515-20. Epub 2006 Oct 6. PMID 17027971
Journal: Experimental Eye Research, Volume 83, Issue 6, Dec 2006
Outflow facility (C), a ratio of outflow rate (F) to relevant pressure, is an important indication of outflow resistance in the ocular drainage pathway. The higher the C, the lower the outflow resistance. According to the classic Goldmann equation, C=F/(IOP-Pe)(IOP, intraocular pressure; Pe, episcleral venous pressure). Since anterior chamber (AC) perfusions directly measure outflow and are less affected by scleral creep and rigidity or changes in uveal blood content than repeated tonography in living eyes, they are widely used to determine C in living animals or cultured anterior segments from enucleated eyes. Bárány (1964) initially developed the 2-level constant pressure perfusion technique for living monkey eyes to avoid possible influences of changes in eye parameters (e.g., Pe, spontaneous IOP [P0] or aqueous humor formation [AHF]) on C measurements. However, since these eye parameters do not exist in cultured anterior segments, 1-level constant pressure perfusion (Erickson-Lamy et al., 1991) and constant flow rate perfusion (Johnson and Tschumper, 1987) are typically used to determine C in organ culture. Based on different perfusion techniques, two basic formulas derived from the Goldmann equation are used to calculate C: (A) C=(F2-F1)/(P2-P1), which is usually used in 2-level constant pressure perfusion either in living animals or in cultured anterior segments (F1 or F2 represents F at P1 [lower perfusion pressure] or P2 [higher perfusion pressure]); (B) C=F/P, which is usually used in 1-level constant pressure perfusion or constant flow rate perfusion in cultured anterior segments (P, perfusion pressure; Pe is ignored in this formula because it is assumed to be zero in the cultured anterior segments). A comparison of C values calculated using Formula B and the data obtained during 2-level constant pressure perfusion in vivo or in vitro requires the following modifications: C=F1/(P1-P0) or C=F2/(P2-P0) where F1 or F2 is due to the change in pressure from P0 to P1 or P2 (P0 is assumed to be stable during short-term perfusions in vivo and is zero in vitro). C values from the same eye and the same perfusion are often quite different when calculated by the two formulas, since Formula A calculates C for the change in pressure from P1 to P2, whereas Formula B calculates C either for the change in pressure from P0 to P1 or P2 in living eyes or for a given pressure (P1 or P2) in cultured segments. However, the difference has not been clearly stated in previous studies, so that confusion might occur when comparing C values obtained by the two formulas. Additionally, C at different pressures may also be affected by factors physiologically unrelated to the formulas. To determine factors that may affect C values and to evaluate the significance of these factors in aqueous humor dynamics research, we compared C values calculated by Formulas A and B based on some previous perfusion experiments.
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s3://commoncrawl/crawl-data/CC-MAIN-2023-06/segments/1674764500080.82/warc/CC-MAIN-20230204012622-20230204042622-00590.warc.gz
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CC-MAIN-2023-06
| 3,173 | 3 |
http://www.ardendertat.com/2011/09/
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math
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Monthly Archives: September 2011
This is a very fundamental question and it’s tricky to implement without any bugs. Given a linkedlist of integers and an integer value, delete every node of the linkedlist containing that value.
This question can be solved efficiently with a very clever trick. There is an array of non-negative integers. A second array is formed by shuffling the elements of the first array and deleting a random element. Given these two arrays, … Continue reading
This is one of the most common interview practice questions. Given an array of integers (positive and negative) find the largest continuous sum.
This is a very elegant question which seems easy at first but requires some hard thinking to solve it efficiently: Given a matrix of integers and coordinates of a rectangular region within the matrix, find the sum of numbers falling … Continue reading
Once again it’s the college recruiting season of the year and tech companies started the interview process for full time and internship positions. I had many interviews last year these days for a summer internship. Eventually I was an intern … Continue reading
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s3://commoncrawl/crawl-data/CC-MAIN-2018-05/segments/1516084892059.90/warc/CC-MAIN-20180123171440-20180123191440-00615.warc.gz
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CC-MAIN-2018-05
| 1,149 | 6 |
http://fontstruct.com/gallery/tag/Machine
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math
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The Gallery: Browse and find FontStructions
We found 25 FontStructions tagged with “Machine”. Hide Options
Last edit: 15.04.20148%20downloads82%20comments2174%20glyphs174A%20favorite%20of%203%20users3This%20clone%20of%20Typ%28o%29%20Writer%201%20has%20the%20%22serifs%22%20removed%20but%20retains%20the%20notches.%20The%20letter%20width%20on%20%21%20%3F%20.%20%C2%BF%20and%20%C2%A1%20is%20increased%20to%20be%20a%20more%20obvious%20end-of-phrase%20symbol%20compared%20to%20the%20%27space%27.%20%0D%0A%0D%0AYou%20find%20an%20alternative%20k%20on%20the%20%7B%20and%20a%20blank%20%27circle%27%2Fkey%20on%20the%20%5C%2C%20an%20EIR%C3%94N%20glyph%20is%20on%20the%20%60.
Last edit: 15.04.20148%20downloads82%20comments2174%20glyphs174A%20favorite%20of%202%20users2The%20first%20of%20a%20set%20of%20%22typewriter%20key%22%20fonts.%20The%20letters%20have%20different%20heights%2C%20I%20aimed%20for%20larger%20size%20letters%20and%20some%20would%20not%20have%20fitted%20into%20the%20circle%20had%20I%20maintained%20the%20proportions.%20%20I%20gave%20the%20letters%20%27personality%27%20through%20slanted%20elements%20which%20do%20not%20interfere%20with%20legibility%20but%20tend%20to%20disappear%20in%20small%20sizes.%0D%0AThere%20is%20a%20blank%20circle%20on%20the%20%5C%20and%20alternate%20k%20on%20the%20%7B
Last edit: 18.05.20133%20downloads357%20glyphs57A%20favorite%20of%202%20users2I%20liked%20the%20last%20one%20better.
Last edit: 11.06.201319%20downloads1998%20glyphs98A%20favorite%20of%201%20user1Type%20With%20This%20Mechanical%20Futuristic%20Font.%20This%20is%20my%20first%20fontstruction%20so%20let%20me%20know%20what%20you%20think%20in%20the%20comments%20section.%20Feedback%20and%20advice%20are%20welcome%0D%0A
Last edit: 14.11.20122%20downloads236%20glyphs36Just%20a%20little%20imperfect%20side%20project%20of%20mine.%20It%27s%20unfinished.%20I%20will%20gladly%20take%20suggestions.
Last edit: 14.03.20128%20downloads82%20comments292%20glyphs92A%20favorite%20of%202%20users2Revamped%20clone%20of%20defunct%20font%0D%0A%0D%0APretty%20proud%20of%20lowercase%20details%2C%20squarish%20nearly-illegible%20stencil%20look%0D%0A%0D%0AIn%20some%20programs%2C%20typing%20in%20ALL%20CAPS%0D%0Acauses%20the%20letters%20to%20collide%20interestingly
Last edit: 25.01.20125%20downloads564%20glyphs64A%20favorite%20of%201%20user1This%20batch%20contains%20UC%2C%20LC%2C%20numerals%2C%20and%20period.%20%20Meant%20to%20be%20symbols%20based%20for%20graphic%20design%20purposes%20rather%20than%20to%20be%20a%20legible%20font.
Some fonts you just can’t FontStruct. Try a non-modular typeface from FontShop.com
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s3://commoncrawl/crawl-data/CC-MAIN-2014-41/segments/1410657114204.83/warc/CC-MAIN-20140914011154-00109-ip-10-196-40-205.us-west-1.compute.internal.warc.gz
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CC-MAIN-2014-41
| 2,602 | 10 |
https://hunbay.com/qa/question-what-is-the-formula-for-calculating-acceleration.html
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math
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- What are the 3 examples of acceleration?
- Is acceleration a speed?
- What is the unit of acceleration?
- What is the formula of velocity and acceleration?
- How do you find acceleration from speed?
- What is the free fall formula?
- What is the symbol for final velocity?
- What is acceleration and examples on its usage?
- What is acceleration and how is it calculated?
What are the 3 examples of acceleration?
ExamplesAn object was moving north at 10 meters per second.
An apple is falling down.
Jane is walking east at 3 kilometers per hour.
Tom was walking east at 3 kilometers per hour.
Sally was walking east at 3 kilometers per hour.
Acceleration due to gravity..
Is acceleration a speed?
Speed is the magnitude of velocity. … Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
What is the unit of acceleration?
Unit of acceleration is the metre per second per second (m/s2). Definition. The snewton is that force which, when acting on a mass of one kilogramme, produces an acceleration of one metre per second per second.
What is the formula of velocity and acceleration?
Key EquationsDisplacementΔx=xf−xiInstantaneous velocityv(t)=dx(t)dtAverage speedAverage speed=–s=Total distanceElapsed timeInstantaneous speedInstantaneous speed=|v(t)|Average acceleration–a=ΔvΔt=vf−v0tf−t013 more rows
How do you find acceleration from speed?
Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v. Use standard gravity, a = 9.80665 m/s2, for equations involving the Earth’s gravitational force as the acceleration rate of an object.
What is the free fall formula?
Free fall means that an object is falling freely with no forces acting upon it except gravity, a defined constant, g = -9.8 m/s2. The distance the object falls, or height, h, is 1/2 gravity x the square of the time falling. Velocity is defined as gravity x time.
What is the symbol for final velocity?
symbol vThe symbol a stands for the acceleration of the object. And the symbol v stands for the velocity of the object; a subscript of i after the v (as in vi) indicates that the velocity value is the initial velocity value and a subscript of f (as in vf) indicates that the velocity value is the final velocity value.
What is acceleration and examples on its usage?
A moving body that follows a curved path, even when its speed remains constant, is undergoing acceleration. 17. 3. The definition of acceleration is a change in the rate of motion, speed or action. An example of acceleration is increasing your driving speed from 45 to 55 to merge with traffic.
What is acceleration and how is it calculated?
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.
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s3://commoncrawl/crawl-data/CC-MAIN-2021-21/segments/1620243989526.42/warc/CC-MAIN-20210514121902-20210514151902-00371.warc.gz
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CC-MAIN-2021-21
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https://apps.dtic.mil/sti/citations/AD0678969
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math
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NUMERICAL SOLUTION OF A HARMONIC MIXED BOUNDARY VALUE PROBLEM BY LINEAR PROGRAMMING.
Technical summary rept.,
WISCONSIN UNIV MADISON MATHEMATICS RESEARCH CENTER
Pagination or Media Count:
A method using the linear programming algorithm is given for obtaining a numerical solution with an error bound to a harmonic mixed boundary value problem in which the region of definition is a rectangle containing a slit. Author
- Theoretical Mathematics
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s3://commoncrawl/crawl-data/CC-MAIN-2021-04/segments/1610704804187.81/warc/CC-MAIN-20210126233034-20210127023034-00785.warc.gz
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CC-MAIN-2021-04
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