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If I am taking takeout home in a plastic bag, is it better to remove all air from the bag when sealing it so no heat is lost to the surrounding air or keep air in the bag acting effectively like insulation? Let's assume the air is room temp/colder when I seal the bag. | 0 |
The Theorem on the Textbook Is there anyone who can explain the theorem to me. I find it hard to understand. Thanks! By the way, what's the formal name of this theorem, I found nothing online. | 0 |
Do you have interesting books presenting abelian variety (over an arbitrary field k) using the scheme point of view? Most of the lectures I know use the point of view presented in the first chapter of Hartshorne (so without scheme). I'm looking for something which presents the modern aspects/questions of those objects. | 0 |
How to find the lateral surface of elliptical cone? Equation of lateral surface is Lateral surface equation but how to find the value of E in this equation? Here is an example. Example | 0 |
Why does a rotating body, like a rod or a spring, exhibit elongation instead of compression even though every part of it experiences "centri-seeking" force? Is it plausible to understand this in an inertial frame of reference, rather than the conventional pseudo refrence frame? | 0 |
While it's not too difficult to derive Snell's Law for acoustics e.g. from Huygen's principle like for light, I find surprisingly little resources on an equivalent to Fresnel formulas linking the reflected and refracted amplitudes, mostly limited to perpendicular incidence and sound intensity in dependence of acoustical impedance, but what are the formulas for e.g. pressure or density continuity at arbitrary angles of incidence? | 0 |
If A and B are two normal matrices with the same eigenvectors, but different eigenvalues, where, A = UVU' and B = UWU', which operations with A and B (sum, multiplication, inverse, etc,.) will change the eigenvectors of the resultant matrix and which will not? | 0 |
I typed a work using wx Maxima. I am really short on time. Is there a way I can convert wxmx/wxm file to LaTeX or PDF? Pls answers should be very basic (i.e a toddler can understand). Also this work includes long equations and matrices but no diagrams or tables, just plain text.Thanks. | 0 |
We know that an eigenvalue decomposition of a matrix is to find those eigenvectors that are just scale for some coefficients. But what about Jordan matrix decomposition? I just learn how it is calculated, but I am not sure whether it has geometric intuition. | 0 |
I am creating a list of special characters used for delimitation in my work. "-","_"," " are delimiters But the latex code is wrapping on " " "-","_"," " are delimiters How do I treat " " as a word that shouldn't be wrapped? | 0 |
Fractal based measures help quantify the self-similar geometrical properties of set (in this case a time-series signal). It mostly represents the global characteristics of geometry of the signal. But with time series as data, we tend to look for local characteristics where Multi-Fractal Analysis is adopted. If my understanding is right about Multi-Fractal Analysis, what are Multi-Fractal Analysis methods available and can be adopted? | 0 |
According to Bohr's hypothesis electrons can exist only at certain special distance from the nucleus only on certain particular orbits which is determined by Planck's constant, how does reach to this conclusion and what's the experiment behind it? | 0 |
I know that composition of dl isn't correct generally, But I read in my text book that we can do that with logarithms and exponential with some conditions So what is these conditions? I don't find them in my text book | 0 |
Do evaporating black holes emit gravitons? I know that hawking radiation consists of photons, and that for very small black holes it can also consists of sun atomic particles, but what about gravitons? Those are supposedly massless particles, can an astrophysical black hole emit those? | 0 |
Is there a specific term for a question, such as Are you asleep? and Can you hear me?, where the binary is Response/No Response rather than Yes/No? I feel like there are other aspects of this concept that orbit this specific question, so any related discussion at all is appreciated. | 0 |
So the way to measure electron spin is to split the beam with a magnet to obtain two beams. Essentially what gets measured is magnetic moment, that is later interpreted as the direction of spin multiplied by Bohr magneton. Is there any "direct" measurement of electron spin that ignores magnetic moment? | 0 |
I know the radius of the Earth and the radius of the orbit (r). I need to find the length of arc (d) along the surface of the Earth given the graphical information presented. Thanks for any help you can provide! | 0 |
In an RL series circuit where the current rate of change is positive, there is a voltage drop across the inductor, if voltage drop means an energy loss, then in what form the energy is lost in the inductor? | 0 |
Assume that N points are distributed uniformly randomly within the unit square, and call these points anchor points. What is the mean, mean minimum, and mean maximum distance of a point randomly chosen within the square that is not an anchor point to its closest anchor point? | 0 |
I want the 'Article Title' to not appear in the header of every page in my springer-nature latex document. May I know what to comment out / replace in the sn-jnl.cls file? Thanks. | 0 |
I have a task where two equal dipoles are separated by a non-grounded, perfectly conducting thin plate. The dipoles are oriented along the plane direction and can be parallel or antiparallel oriented. I wonder what the force is between the plate and the dipoles and between the two dipoles and whether one can reach perfect force cancellation. Thank you very much! Alexey | 0 |
Why are the so-called radio-transparent dielectric caps covering parabolic antennas based on a metal frame, which, in theory, will work like a Faraday grid, and if it does not absorb the entire signal, at least significantly attenuate it and create interference due to secondary radiation? Look inside Look outside | 0 |
I have question about matrix derivation, there are two matrix derivation in png, the first is simple one that i wrote, the second matrix is my main question. I want to know is this true calculation? https://i.stack.imgur.com/yLRNY.png | 0 |
As eg from Wikipedia: https://en.wikipedia.org/wiki/Notions_(sewing) The term is chiefly in American English... was also formerly used in the phrase "Yankee notions", meaning American products I'm wondering if anyone can provide a more detailed explanation of how this word came to have its sewing-related meaning. | 0 |
He claimed to find the atmosphere vital and creatively invigorating. Perhaps there was something to this: he had taken his languishing novel out of the trunk for the first time in nearly a year. It by Stephen King Could you guys tell what he meant by saying that the novel got taken out of the trunk? Is this some kind of idiom? | 0 |
Is it possible to create the following effect in latex? The core is that it have a distinct color for each word instead of using a shading, which can mess the text up. It's fine if this is done using javascript and svg. Credits for Celeste for this image...... I'm trying to port wavedash.ppt to latex using dvisvgm, but I'm kinda stuck. | 0 |
What would be the correct form of this phrase? Atom forge or Atomic forge I know 'atomic' is an objective and 'atom' being a noun is correct when used with forge because you are forging something. But 'atomic' sounds right and I've seen that used before. Just want some clarification. | 0 |
I have been learning more about sets lately and have stumbled upon notation (or I guess a language) such as this: I would like to know the name of this notation and perhaps some resources to learn it. | 0 |
Is there a reference out there that only focus on (different)rank of matrices(with all kind of entries: real, complex, integers) and connects then further to ranks of tensors and further with the ranks multi-linear operators. Thank you in advance. | 0 |
In the rational sequence topology, rationals are discrete and irrationals have a local base defined by choosing a Euclidean-converging sequence of rationals and declaring any cofinite subset of this sequence along with the irrational to be open. Do these choices of sequences matter? Or does there exist a homeomorphism for any pair of sequence assignments? | 0 |
What is the linkage between Loop Quantum Gravity and the approach of the Polymer Quantization? I know you get a lattice using the correct polymer representation, so that's a good toy model for the full theory of LQG, but what are the assumptions to justify this as toy model? What is that we are neglecting/suppressing of the full LQG? | 0 |
I am working with some textbook trigonometry. Its proofs always take the LHS and show that it is equal to the RHS, but I find cross multiplication easier and faster. Can we indeed do it my way? For example: | 0 |
A Euclidean space is an affine space over the reals such that the associated vector space is a finite-dimensional inner product over the real numbers. https://en.m.wikipedia.org/wiki/Euclidean_space#Technical_definition Is the theory of Euclidean space Euclidean geometry? | 0 |
I want to use different calligraphic versions, mathcal and pazocal, of some letters in the same project. However, when I add the pazocal package, even mathcal letters show up in the pazocal format. Is there a way to use both styles for different letters in the same document? -RD | 0 |
Was playing around on desmos and discovered that the graph of x! = y does not interact with zero at any point. Was wondering if any maybe complex number or number that desmos didn't properly compute who's factorial equals zero. Keep in mind I am just a highschool student so I might not understand some terminology | 0 |
I understand it requires Newton's third law but how to prove it. Is it like an axiom in physics like in mathematics. in mathematics you cannot prove it, in physics you cannot explain it elementarly (if that's a word). | 0 |
I have a question about hyphenating compound nouns when they function as object complements. For instance, should entertainment oriented be hyphenated in below sentence? Much of the radio programming was entertainment oriented. Likewise, well-acknowledged This issue is well acknowledged. | 0 |
What can I call a thing that is one-of-a-kind? This restaurant's Loganberry Duck is one-of-a-kind, and the Crystal Brush Pulpo is another _______. I want to use it to compliment a dish, to express the "you can only get this here" kind of meaning. | 0 |
I am basically confused as why can't larger nuclei undergo fushion and release energy. One reason I know is because of too much protons than neutrons which generates stronger electrostatic repulsive forces.But another reason is something related to binding energy per nucleon which is making it difficult for me to understand. | 0 |
So a type of measurement, in units, is length, position, mass, etc, and a unit is meters, kilograms, etc. Is it accurate to say that "an hour" is a time measurement, but also a form of length, especially if we're talking about time "passing"? | 0 |
Is it possible to increase the dielectric strength of any or some materials by adding a certain layer on its surface? And do you know any? The purpose is lastly to improve the electrical breakdown. | 0 |
Frictional electricity makes the charges get separated so when the airplanes are running in air at very high speeds, resistance will be created by the air so due to this frictional electricity will be developed on the surface of the plane, so by this method can we generate electricity? | 0 |
Is 'clinch' used not for embrace but the romantic relationship itself? I think I've heard it used, though I may be imagining it/misunderstanding. Is it idiomatic enough to be something other than a metonym? | 0 |
How can I typeset a proof in this style? That is, how can I write proofs with three columns, the first numbering the premise or assertion, the second containing the premise or assertion itself, and the third containing the justification of the assertion (if the second column of that row contains an assertion)? | 0 |
So lets assume for this question that negative mass exists then will a theoretical planet made of negative mass create an outward bulge in spacetime to create antigravity (repulsive). Also for this question use this image to represent spacetime curvature created by positive mass (Basically regular attractive gravity). I thought that negative mass would make spacetime bulge in the opposite outward direction. | 0 |
Covariant derivatives take into account for both component and basis changes, thereby applicable for curved spaces - where partial derivatives only take component changes into account - is this statement correct? In a polar coordinate system basis changes, even though the space is flat. Will that be considered in partial derivatives? Or we need covariant derivative for that? | 0 |
If spacetime is a single enitity, and the Big Bounce is the idea that space itself will collapse back in on itself, does that mean that time will collapse back in on itself? And... what does that look like? | 0 |
Metric space d(z,w)=|z-w| is complete metric space .i have idea that any sequence in C is Cauchy iff its it's real and imaginary part are Cauchy sequence in thus by using completeness of R can I prove this statement please verify it. | 0 |
Many physicists use thermodynamics to understand what is happening at a cosmic scale. It feels a bit off. Will most concepts directly apply, or do we need to be cautious while using some formulae? | 0 |
There is a point (x,y) in the elliptical orbit inclined at theta angle. I know the x, y coordinates and the center coordinates and Major Minor. In this case, is there an equation to find the tangent line? | 0 |
I can't find the definition of this terminology. Actually, there is a similar question 'what is the split k-algebra?'. But the notes in the answer is unavailable and I can't add comments somehow. So I ask a new question. | 0 |
Problem Hello, I am studying modeling and control course and I'm struggling with drawing neat figure describing the reactor system and to write the differential equations in detail describing the evolution of the variables of the system. My scratch This is the way I approached. Is there any mistakes or wrong approach/assumptions that I made? Fill free to give me any advice. | 0 |
This comes straight up from a certain text that I was going through, which of course is in the form of a question which asks 'A solid cylinder is rolling without slipping and how many generalized co-ordinates are required. Are there any quasi-generalised co-ordinates?' Any help is appreciated. | 0 |
The harmonic series symbol is often denoted by H in LaTeX, that looks like this: On Knuth's Concrete Mathematics book, the symbol looks like this: The book used AMS Euler as the typesetting font, where the normal "H" and the harmonic "H" were different. Is there any dedicated symbol for the harmonic series in LaTeX? | 0 |
I know that for a linear vertical spring, the governing equation of motion written in the presence of gravity is the same as the one written in the absence of gravity. We can either undergo a transformation or cancel the terms while balancing the laws using the free-body diagram. What about nonlinear springs? Please let me know the possible explanations. | 0 |
Why doesn't light simply go more slowly without bending? Is there a macro phenomenon, say a stream of bullets, that will also bend as it changes from one medium to another or is light somehow unique? | 0 |
As per my knowledge, the node which having the least cost is branched in branch and bound approach to solve n puzzle problem. What happens if there are multiple nodes with minimal cost ?? Any of the node is taken or every node must be branched ? | 0 |
Since ALL operating systems have a 'Desktop' - The area of the screen that contains your regularly used shortcuts, taskbar, menu and notification areas. It would be more accurate to be 'Workstation' that shows a 'Desktop' for user interaction. Equally, a 'Laptop' or 'Portable' that shows a 'Desktop' for user interaction. ... All PC's have a 'Desktop' | 0 |
I would like to tie my new connector to my cable tightly using the provided string. This is what the untied knot and the the tied knot look like; unfortunately, the adaptor can still slip and slide around the cable since the knot is loose. What type of topological problem is this? And how would it be asked mathematically? | 0 |
reflectivity of a mirror is very high but on a microscopic level no mirror is perfectly smooth so all the reflections must be diffused and we should not see any perfect reflection so how do we see such perfect reflections | 0 |
The question hung in the room we were in, trembling in the cold. Is the antecedent (in the broader sense) of the dependent clause 'we' or 'the question' here? How would you improve the sentence, given that it needs to start with 'The question..."? | 0 |
A basis for the density matrix operators is the Pauli Matrices set, but if i'm understanding correctly all Pauli matrices are square and even dimensional, since they are kronecker products of the basic pauli matrices, then maybe they're a base for just even dimensional density operators? if yes there's a way to write odd density operator only as Pauli matrices? | 0 |
I want to produce a beamer presentation exactly as the one attached, it is like the Antibes theme but not exactly. I need to know which theme it is or if is it a customized theme. Antibes theme does not include the Author or the title at the footer, which is exactly what I need to add. | 0 |
Dears, I have a sum of two polynomials, and I want the roots of this sum in the left half plane, meaning negative roots. I am looking for some useful theories, but I have not found good things yet. I want to find some condition on each of these polynomials so that their sum has negative roots. | 0 |
I want to see the page corresponding to edited Tex page when I compile the file on Overleaf, but it always return to the first page in PDF file. How can I fix this? | 0 |
Sean wasn't as keen about maintaining his gun as a proper soldier should be, and that led to his rifle jam/jamming during the battle. Is there only one right option here, or are both variants valid but have different meaning? | 0 |
There is a voltage drop between the start and end point of a resistor. How does it achieve this difference in potential? For there to be a difference in potential there must be difference in charges. So do electrons build up at the entrance which in turn creates a difference in potential? | 0 |
So a dipole antenna is supposed to work with AC supplies. But would it still produce propagating EM waves if pulses of DC are supplied instead of AC current? show in the image: | 0 |
How can you succinctly say that something is likely to draw the jealousy of others? That would be ____ Especially if it's slightly negative too, attracting not only jealousy but also hate or dislike because of how jealous they are | 0 |
I understand what reflexive relation on a set is, but I struggle to come up with a practical use of it - why would you even bother defining it? I would really appreciate a couple examples, where reflexions are used, so it would be a little easier to understand - why they are needed? | 0 |
It seems like most phones, tablets and computers have features when charging to prevent battery degradation. When this feature is activated, it seems the battery does not charge constantly, the best way I can describe it is the battery charge percentage has a similar feature to the enzyme, kinetics reaction. Would a logistical or exponential equation best approximate the charge time. | 0 |
My professor told me torque can be calculated about any point in space, but would such a torque ever make sense even if the particle is rotating about some other axis, on which the point does not lie? | 0 |
such as IEEE Transactions on Affective Computing format is shown below, The PDF generated by the template obtained through IEEE Template Selector is not in this format. How do I get the right template? Thanks in advance. | 0 |
I realize that this editing won't make the question open (since this is against the guidelines to share results and ask to check them). Meanwhile, I'd like to replace a lot of text with a link so those who can see it won't have problems with rendering. | 0 |
assume a perfectly vertical plane, smooth surface with no deflection and an elastic ball. the moment the ball reaches the lower surface, kinetic energy is at maximum when the ball strikes the lower surface, it then compresses, and some (or all) kinetic energy becomes elastic energy. when the ball has reached maximum elastic compression, does it momentarily stop? | 0 |
I was wondering if there is some theoretical result (different from the connectedness definition) that characterises the connected subspaces of a connected space. I have looked over my General topology but I do not find anything and I do not see any way to prove something like that. Moreover, if the space is a topological manifold, is there such a result? | 0 |
I've found this diagram about the conduction band (https://energyeducation.ca/encyclopedia/Conduction_band): But are there other energy bands over the conduction band? Or is the electron simply kicked out of the solid (and so its energy becomes continuous, not in discountinous band). | 0 |
I would like to draw the following graphs in tkz-graph package. These are the unit-distance colored Golomb graph and Moser spindle respectively. when i try using the regular polygon operation it misaligns the edges and the second graph isnt regular so idk how to draw it | 0 |
A Smooth Disc with a grove is rotated with constant angular velocity, about its center A block is placed in the grove. What force is acting on the block here to "throw" the block outside the grove, if we look at it from the ground frame? | 0 |
Please can you explain me this notation (B)^I ,where B is basis of topology and I us interval and U belong to topology generated by B and Ui belong to (B)^I and U = union of Ui Thank you | 0 |
Used be, one gave a gift. It was called gifting, the gift was given. When, why and how did "gift" replace "give" as in "I gifted her a bouquet"? "Gifted" used mean talented eg "a gifted musician". | 0 |
In other words, I want to prove that angle is at its maximum when it lands at A. Each of these angles goes through a third of the diameter. That is, if we set O as the center of the circle, Angle A reaches its maximum when AO is perpendicular to the diameter in the figure. | 0 |
Is there any chance, that you can help me with my problem? I've already used answers from topic: Circle and arrow on a single term of a math equation It works very well. But is it possible to have an arrow going down, when expression is in a denominator? I would like to have something like this: | 0 |
I have added the image of the part of page (the specific statement is highlighted), why does the text says that the capacitors are not connected in series ? And why the text says that they are not in parallel connection ? | 0 |
Can proton convert into neutron and another neutron simultaneously into proton in nucleus of a stable element? Which conditions are needed for this? Is this question make sense at current stage of science and technology? | 0 |
I want to increase the length of the legend symbol (like solid lines, dashed lines, dot dashed lines, dotted lines etc) in the legend box since for dot-dashed lines the length of the symbol is too small to be differentiated by other symbols in the legend box that I use. | 0 |
I understand some parts of the theory, I've read from here https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Supplemental_Modules_(Astronomy_and_Cosmology)/Cosmology/Carlip/Hawking_Radiation What exactly is negative energy and how is it different from the "negative" or "positive" we use when talking about an electron or a proton? Why can negative energy only exist inside the blackhole? | 0 |
I understand that there are different definitions of finite. They are all equivalent over ZFC, and some of them are even equivalent over ZF, but not over weaker theories than ZF(C). I would like some texts that define various notions of finite, and develop the theory quite a bit. | 0 |
If everything in the universe happens according to rules, thermodynamic or otherwise, then how would anything (or any choice) ever be stochastic? Multiple choices might be probable, but in any instant the ones that get chosen are based off of those rules. Doesn't that rule out stochasticity? | 0 |
This problem came in my mocks. I tried writing the sum down and sandwiching it but I could not find appropriate "sandwiches" to this. Please help me with this. I nearly spent an hour on it and could not find a solution. | 0 |
I'm struggling with the correct way to use barrier to entry in the following sentence: Technical interviews are an ever present barrier to entry in the software industry or Technical interviews are an ever present barrier to entry into the software industry Does using 'in' versus 'into' dramatically change the meaning of the sentence and is one more correct in this context? | 0 |
Usually optimisation problems consist in maximizing a function given some linear constraints. What if one simply has a system of linear equations with some constraints on the variables that come in the form of linear inequalities. Can this be cast as a linear programming problem? If so, how is it classified/where can I read more about it? | 0 |
Can all verbs with to infinitives in the place of the object complement use both the past participle and to be p.p. form when the relationship between the object and the object complement is passive? I expected my car (to be) repaired soon. Is it okay to use either form? | 0 |
Is the intersection of two connected set is connected?? I think it is connected, I can't find any counter example to prove it disconnected. My approach is-> A,B connected. Let A meet B disconnected,A meet B =PUQ where P,Q are separated set What next?? | 0 |
Force is defined by acceleration , and acceleration requires the determination of" inertial frames". But an inertial frames also requires the knowledge of forces which requires measuring acceleration, but with respect to what ? | 0 |
Hi could you please let me know if the "that modifer" modifies the closest noun (i.e exercises) or further away head noun (i.e. vocabulary), in the following passage. Let's review some vocabulary from the last few reading exercises that I've published here on the blog. | 0 |
If we place different materials in the microwave owen, they will get hot at different speeds. For instance meals get hot really fast. What material property decides on the strength of the coupling? Resistance? Permeability? | 0 |
Can't we make a face with just two edges(sides) and two vertices? We just connect those two vertices twice each with different edges and we can make a face between the two edges with only two vertices and edges like the image. | 0 |
If all matter began from one infinitesimally small point, and flew outward from there. How can we have galaxies colliding? Did they make left hand turns or something? Or it is possible multiple galaxies were created by secondary coalescing and re-exploding of galactic material, flinging them in new directions? Wouldn't that increase the time-frame of the Universe's age? | 0 |
Is it practically possible to detect big and solid amounts of steel on the ground at long distances? (e.g. vehicles on line of sight) Metal detectors do it but at short distances and suffer of parasitic detections from minerals in the soil and etc. Radars detect it well but can't distinguish from other non metal but big objects. | 0 |
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