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09364defb6b6356c339cf0b3feef94ab | tell me the easy trick to slove the value of cos37,cos53,sin37,sin53 | askiitians.com | 2021.31 | [
{
"text": "the easiest trick to remeber anything is to make a pattern out of the problem nd same goes here, cos37=4/5 cos53=3/5 inverse of cos37=sin53 inverse of cos53=sin37 sin37=5/4 u can also calculate these values ueself , cz this way the best. sin53=4/5",
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] |
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3c688be15581829eaf88309353e5d4b0 | a pendulum takes 30 sec to complete 20 oscillition . what is the time period ? | askiitians.com | 2021.39 | [
{
"text": "given that the pendulum makes 20 oscillation in 30secs, the oscillation made in one sec is,oscillations = 20/30 = 2/3 = 0.6667",
"name": "",
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{
"text": "given that the pendulum makes 20 oscillation in 30secs, the oscillation made in one sec is, oscillations made per second = 20/30 = 2/3 = 0.6667. recall that the number of oscillations made per second is called as frequency. hence, frequency = 0.6667 hz time period = 1/ frequency. time period = 1/0.6667 = 1.5 sec. hence, time period is 1.5 sec",
"name": "",
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{
"text": "use scholr app for exam preparation. given that the pendulum makes 20 oscillation in 30secs, the oscillation made in one sec is, oscillations made per second = 20/30 = 2/3 = 0.6667. recall that the number of oscillations made per second is called as frequency. hence, frequency = 0.6667 hz time period = 1/ frequency. time period = 1/0.6667 = 1.5 sec. hence, time period is 1.5 sec",
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04cdca2a08dd96fce30a205f40f05c75 | if two electrons are forced to come closer to each to each other, then the potential energy a. becomes zero b. increases c. decreases d. becomes infinite | askiitians.com | 2021.21 | [
{
"text": "dear student the answer is option b regards",
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},
{
"text": "note that if q is negative, its sigh should be used in the equation! therefore, a system consisting of a negative and a positive point-like charge has a negative potential energy. a negative potential energy means that work must be done against the electric field in moving the charges apart!",
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99dc9874d680f486b040b88176732ecb | i have passed 12th class with 72 % aggr. n i want to do iit please help me 2 hav such confient i m dropping dis year . here i also want to let u know dat somehow i find little difficulty in maths this year i hav get 52 marks in aieee. i m 4m sc category can i b able 2 get ny nit dis year???????? | askiitians.com | 2021.25 | [
{
"text": "dear abhivasya, yes, you shud drop and study hard .. as you belongs to sc catagory .. you have very good chances of getting the nit. check out the opening and closing rank for collages under aieee: http://www.askiitians.com/aieee-counselling/aieee-engineering-counsellings.aspx please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. askiitians expert amit yadav now you can win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian.",
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|
99517a359124d4744adf848326896c74 | i am getting 269 marks.what is my expected rank? | askiitians.com | 2021.21 | [
{
"text": "here's the criteria of your ranking would look like - marks -255-269, ranking - 101-500",
"name": "",
"is_accepted": false
},
{
"text": "expected ranks based on marks in iit-jee 2010 expected marks expected rank above 290 below 500 289-275 501-1000 274-245 1001-2000 244-225 2001-3000 224-210 3001-4000 209-200 4001-5000 199-190 5001-6000 189-179 6001-7000 180-175 7001-8000",
"name": "",
"is_accepted": false
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|
8fe322bd37d3e242591597973cf2528d | 36. the number ‘π’ is (a) natural number (b) rational number (c) irrational number (d) rational or irrational | askiitians.com | 2021.43 | [
{
"text": "answer: c",
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|
1a4cecbd1e55b419d7b1a3ed5b120d5d | in last year cutoff rank, it has been mentioned as ai - category wise and hs - category wise. what is ai & hs quota? | askiitians.com | 2021.25 | [
{
"text": "i think ai means all india and hs means home state.",
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},
{
"text": "sir my aieee 2012 detail r as all india rank overall 211373 ------ category 10593 ------ state rank overall 31708 ------ category 1845 ------ sir is there any chance of getting gud clg through aieee and i m sc candidate and sir plz tel me how hs quoata work i am frm lko up hoping soon reply thanks",
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] |
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d914e198fea9a1601fa8f668fb732892 | a particle mover along the parabolic path x=y^2 + 2y + 2 in such a way that the y-component of velocity vector remains 5 m/s during the motion.the magnitude of acceleration of the particle is- | askiitians.com | 2021.31 | [
{
"text": "hi, a = root{(ax)^2 + (ay)^2} a= total acceleration ax = acceleration along x axis = d^2x/dt^2 ay = acceleration along y axis = d^2y/dt^2 here vel. in y directn =dy/dt = 5 m/s (constant) => ay = 0 now differentiate the given eqn => vx = 2y*dy/dt +2* dy/dt = 2y*5 + 2 *5 vx = 10y + 10 again diff. ax = 10 *dy/dt = 10* 5 = 50 m/s^2 a = root{(ax)^2 + (ay)^2} => a = ax = 50 (as ay=0 )",
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27af8b488234fbdf3eb812f53129e4aa | may i got an admission in cs engineering in aieee my ai rank is 49853 | askiitians.com | 2021.21 | [
{
"text": "dear mayank, here with your ai rank.. you can get cs branch in some good collage but getting nit is difficult with rank. closing and opening rank of all the nit’s and other top collages under aieee. http://www.askiitians.com/aieee/aieee-counselling aieee cut off … you can check here … http://www.askiitians.com/aieee-2010/aieee-2010-cut-offs.aspx if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. all the best. askiitians expert vijay luxmi",
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|
681aa66b52a15e49e3c8388feae28d61 | which is the smallest living cell pplo or mycoplasm? | askiitians.com | 2021.43 | [
{
"text": "mycoplasma is also called as pplo (pleuro pneumonia like organisms). they are the smallest living organisms on earth, they also lack cell wall and can survive without oxygen. hope it helps regards arun",
"name": "",
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{
"text": "mycoplasma and pplo(pleuro pneumonia like organisms) are the same. they lack their cell wall, thus are pleiomorphic and not affected by antibiotics targeting cell walls (eg. penicillin) they can also survive without oxygen. these are the smallest living organism. also called 'bacteria with their coats off' and 'jokers of plant kingdom'. hope this helped with complete info. then please do give a thumbsup! 😊👍",
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|
55f0e98495bd9d651acfb8f3da86020a | which part of the cell contains organelles? | askiitians.com | 2021.21 | [
{
"text": "cytoplasm",
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"is_accepted": false
}
] |
|
4105b3acfc83287efdeeced6a2bab0cd | sir, do the criteria of securing 80-above % in board exam has been implemented for students preparing for iit jee 2011. | askiitians.com | 2021.43 | [
{
"text": "dear mr. yogesh; this is a just a proposal and may be implimented next year but till now there is not any official annoncement of this. second thing is if this will applicable the percentage will be lower than 80. so do not worry about this rule. please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee & aieee preparation. all the best. regards, askiitians experts pramod kumar iitr alumni",
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|
5c098bc9986f74b231f77ab4381a644a | if my marks in mathematics subject in class 10 is less than 60%, will i be eligible? | askiitians.com | 2021.39 | [
{
"text": "dear vinita are u talking about the aiims mbbs exam ?? then class 10 th marks are not required for aiims , u need class 12 th mark only for aiims . and that too for phy , chemi and biology , not maths hope it clears regards",
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|
9aade6137d657fab027bad0ce6be3677 | is there any situation where instantaneous displacement is zero but the instantaneous velocity is not zero ? | askiitians.com | 2021.43 | [
{
"text": "it is possible in circular motion, at the instant when the particle completes one full circle, instantaneous displacement is zero, but velocity and acceleration are not zero.",
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9a381a182356ebe13ffee07b548b693e | largest gp between 100 and 1000 hhjjvfgkljddjlkddfhllngjmhjjdeh | askiitians.com | 2021.31 | [
{
"text": "@ ankit kindly recheck the query and do get back to us . your question is actually not understandable . post the question again in the forum waiting to hear from you again all the best ..",
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] |
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e3a2c1f0dc7e48144f73809626181c28 | if (sin^4x)/a + (cos^4x)/b = (1/(a +b)) prove that (sin^8x)/a + (cos^8x)/b = (1/(a +b)^3) sshanbhag\[email protected] | askiitians.com | 2021.25 | [
{
"text": "the question has an error should be corrected as shown q. if (sin^4x)/a + (cos^4x)/b = (1/(a +b)) prove that (sin^8x)/a^3 + (cos^8x)/b^3 = (1/(a +b)^3)",
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"text": "cos^4x=(cos^2x)^2=(1-sin^2x)^2=1+ sin^4x-2sin^2x =>sin^4x / a +cos^4x / b=1/a+b =>sin^4x/a + (1+sin^4x-2sin^2x)/b = 1/(a+b) [b*sin^4x + a(sin^4x-2sin^2x+1)] /ab = 1/(a+b) =>[(a+b)sin^4x-2a sin^2x+a]/ab = 1/a+b =>(a+b)^2 sin^4x - 2a(a+b)sin^2x + a(a+b) =ab =>(a+b)^2 sin^4x - 2a(a+b)sin^2x + a^2 => [(a+b)sin^2x-a]^2 = 0 =>(a+b)sin^2x - a = 0 sin^2x=a/(a+b).........(1) (take fourth power of both side) =>sin^8x=a^4/(a+b)^4 (divide by a^3 both side) =>sin^8x/a^3=a/(a+b)^4. ........(2) =>cos^2x=1 - sin^2x=1-a/(a+b)=b/(a+b). (from eq 1 substituting value of sin^2x) =>cos^2x=b/(a+b)...........(3) (take fourth power of both side) =>cos^8x=b^4/(a+b)^4 (divide by b^3 both side) =>cos^8x/b^3 =b/(a+b)^4......(4) (adding eq 2@4) =>sin^8x/a^3 + cos^8x/b^3=a/(a+b)^4 + b/(a+b)^4 =(a+b)/(a+b)^4=1/(a+b)^3 ........proved",
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{
"text": "sin^4x /a + cos^4x /b =1/a+ba+b (bsin^4x +acos^4x )=ababsin^4x +b^2sin^4x +abcos^4x +a^2cos^4x =abab (sin^4x +cos^4x )+a^2cos^4x +b^2sin^4x =abab (1-2sin^2x.cos^2x )+a^2cos^4x +b^2sin^4x =aba^2cos^4x +b^2sin^4x -2absin^2x.cos^2x=0(acos^2x+bsin^2x)^2=0acos ^2x=bsin^2xa (1-sin^2x)=bsin^2xa-asin^2x=sin^2xa=(a+b)sin^2xsin^2x=a/a+b (1)similarly......cos^2x=b/a+b (2)take 4th root both side in both eq..then we have.....sin^8x=a^4/(a+b)^4 (3)cos^8x=b^4/(a+b)^4 (4)now divide eq (3)by a^3 and eq (4) byb^3and then add the eq..after doing that we have .....sin^8x/a^3 +cos^8x/b^3 =a/(a+b)^4 +b/(a+b)^4sin^8x/a^3 +cos^8x/b^3 =1/(a+b)^3hence proved",
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{
"text": "sin^4x/a +cos^4x/b =1/(a+b)....eq(1)(1-cos^2x)b + cos^4xa =ab/(a+b)b+bcos^4x-2bcos^2x+cos^4ax-ab/(a+b)=0cos^4x(a+b)-2bcos^2x +b-ab/(a+b)=0cos^4x(a+b)^2-2b(a+b)cos^2x+b^2=0cos^2x= (2b(a+b)+-√((4b^2(a+b)^2-4b^2(a+b)^2))/2(a+b)=b/(a+b)------by quadratic equationso, cos^4x=b^2/(a+b)^2and sin^4xb=ab/(a+b) - cos^4xa by eq(1)so sin^4x=a^2/(a+b)^2putting sin^8x/b^3+cos^8x/a^3, the values of sin and cos we get,(a+b)/(a+b)^4=1/(a+b)^3",
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"text": "we can`t use both lhs and rhs while proving.🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔝🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚🔚",
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"text": "dear student sin 4 x/a + cos 4 x /b = 1/(a + b) => sin 4 x/a + (cos 2 x) 2 /b = 1/(a + b) =>( sin 2 x) 2 /a + (1 - sin 2 x) 2 /b = 1/(a + b) let, sin 2 x = k k 2 /a + (1 - k) 2 /b = 1/(a + b) => [bk 2 + a(1 - k) 2 ]/ab = 1/(a+ b) => [bk 2 +a(1 - 2k + k 2 )]/ab = 1/(a + b) => [bk 2 + a - 2ak + ak 2 ]/ab = 1/(a + b) => [k 2 (a + b) - 2ak + a]/ab = 1/(a + b) => k 2 (a + b) 2 - 2a(a + b)k + a(a + b) - ab = 0 => k 2 (a+ b) 2 - 2a(a + b)k + a 2 + ab - ab = 0 => k 2 (a + b) 2 - 2a(a + b)k + a 2 = 0 => {k(a + b)} 2 - 2.k(a + b).a + (a) 2 = 0 => [k(a+ b) - a] 2 = 0 => k(a + b) - a = 0 => k(a + b) = a => k = a/(a + b) hence, sin 2 x = a/(a+ b) cos 2 x = 1 - a/(a + b) =[a + b - a] /(a + b) = b/(a+ b) now, sin 8 x = (sin 2 x) 4 = [a/(a + b)] 4 = a 4 /(a + b) 4 => sin 8 x/a 3 = a 4 /(a + b) 4 .a 3 = a/(a + b) 4 similarly, cos 8 x = (cos 2 x) 4 = [b/(a + b)] 4 = b 4 /(a + b) 4 => cos 8 x/b 3 = b 4 /(a + b) 4 .b 3 = b/(a + b) 4 now, sin 8 x/a 3 + cos 8 x /b 3 = a/(a+ b) 4 + b/(a + b) 4 = (a + b)/(a+ b) 4 = 1/(a + b) 3 hence proved. i hope this anwer will help you. thanks & regards yash chourasiya",
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291e5f5aadc10700d35fde86352ad92d | 64. why are the coal, petroleum and natural gas called fossil fuels? | askiitians.com | 2021.31 | [
{
"text": "answer: explanation: coal, petroleum and natural gas, the common sources of energy, being organic (biotic) in their origin and formed over a long period of time are called fossil fuels.",
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8f355fbfddd6196259cabb28b5df42b3 | the value of a from which one root of equation e^a x^2 - e^2 ax +e^a -1=0 lies between 1 and 2 are given by | askiitians.com | 2021.25 | [
{
"text": "let the polynomial on the lhs be f(x), (f(2)/f(1))<0,upon simplification, we get 4e^a -2e^2a +e^a -1>0 solving this quadratic inequality in e^a =y, we get (5-√17)/4<y<(5+√17)/4,therefore ln((5-√17)/4)<a<ln((5+√17)/4) 'win exciting gifts by answering the questions on discussion forum.'",
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aaad25c131624995978d5fe72e12a612 | ferro columbium rection in your book. how to perform can anybody tell me? jayeshgroup dot com | askiitians.com | 2021.25 | [
{
"text": "dear student i didnot get the question. please make it ore clear. i will be happy to help you. regards arun",
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{
"text": "sir, i want a chemical reaction for ferro columbium. i am finding easy one but i didn't get. regards jayeshgroup",
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},
{
"text": "ferro niobium/columbium is acted as anti-corrosive properties & can make an alloy weldable and much stronger. ferro niobium/columbium helps to increase resistance during high temperature & also prevents corrosion, oxidation & erosion. ferro niobium/columbium is used for the production of steel having application in various industries such as automobiles, heavy trucks, bridges & flyovers, construction cranes, amusement park rides and any other structure that needs to handle a large amount of stress or needs a good strength-to-weight ratio.",
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cb903632ecf36a18fb3d647fea55da91 | if the surface area of alveoli is 75m square then why dont we swell this much when we breathe? | askiitians.com | 2021.39 | [
{
"text": "you are not taking it in the right way. its absolutely correct that surface area of alveoli is 75 m square but their stucture is such that it increases the surface are but not the volume. they are numerous spherical structures (refer to the diagram) which increase the surface area for exchange of gases but the volume remains same.",
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9b51bfefd52844a1cf1a0b28b0d12ee2 | can you suggest me some books for iitjee foundation. i am in class 9 presently and studying in fiitjee 4 year class room programme.i have done class 9 ncerts and hc verma class 9 and rd sharma which other books should i refer some really good and hard tough books for class 9 | askiitians.com | 2021.39 | [
{
"text": "s.dinesh in physics and chemistry and you should take arihant publications books",
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d06425224fa9dec24e240d1b01e530ad | the relationship between osmotic pressurev at 273 k when 10 g glucose (p1),10g urea(p2) and 10 sucrose(p3) are dissolved in 250 ml of water: (a)p1>p2>p3 (b)p3>p2>p1(c) p2>p1>p3(d)p2>p3>p1;explain it | askiitians.com | 2021.25 | [
{
"text": "dear bharat, the osmatic pressure is given by π = i m r t , where i is the dimensionless van 't hoff factor m is the molarity r =0.08206 l · atm · mol -1 · k -1 is the gas constant t is the thermodynamic (absolute) temperature the osmatic pressure is directly proportional to the molarity,since other values are constant for the three compounds. the molarity is inversly proportional to molecular weight. molecular weight of urea = 60 glucose = 180 sucrose = 342 hence our answer is (c) p2>p1>p3 please feel free to ask your queries here. we are all iitians and here to help you in your iit jee preparation. all the best. win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar respectively : click here to download the toolbar.. askiitians expert suryakanth –iitb",
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{
"text": "p=crt osmotic pressure is inversly proportional to molar mass if all other parameteres are constant so higher will be the molar mass lower will be the osmotic pressure hence option c is correct",
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"text": "dear student, please find below the solution to your problem. the osmatic pressure is given by π = imrt, where i is the dimensionless van 't hoff factor m is the molarity r=0.08206 l · atm · mol-1 · k-1 is the gas constant t is the thermodynamic (absolute) temperature the osmatic pressure is directly proportional to the molarity,since other values are constant for the three compounds. the molarity is inversly proportional to molecular weight. molecular weight of urea = 60 glucose = 180 sucrose = 342 hence our answer is (c) p2>p1>p3 thanks and regards",
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19629ff52c27d4df1f41f0c78d7feded | when a metal plate is exposed to a monochromatic beam of light of wavelength 400 nm, a negative potential of 1.1 v is needed to stop the photocurrent. find the threshold wavelength for the metal. | askiitians.com | 2021.25 | [
{
"text": "sol. λ = 400 nm = 400 * 10^-9 m v base 0 = 1.1 v hc/λ = hc/λ base 0 + ev base 0 ⇒ 6.63 * 10^-34 *3 * 10^8/400 * 10^-9 = 6.63 * 10^-34 *3 * 10^8/λ base 0 ⇒ 4.97 = 19.89 * 10^-26/λ base 0 + 1.76 ⇒ 19.89 * 10^-26/λ base 0 = 4.97 – 17.6 = 3.21 ⇒ λ base 0 = 19.89 * 10^-26/3.21 = 6.196 * 10^-7 m = 620 nm.",
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825b47a2950362f68a14d10d41227601 | which of the following compounds would undergo cannizzaro reaction? hcho c6h5cho cl3c − cho (ch3 )3c − cho | askiitians.com | 2021.25 | [
{
"text": "dear mandeep except ccl3cho al will underogo cannizaro reaction. hence option a, b, d are correct regards arun",
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82474bcfd18e8c7bc0e4e189f5808547 | fertilizers | askiitians.com | 2021.31 | [
{
"text": "fertilizers more than twelve elements such as carbon, oxygen, hydrogen, nitrogen, phosphorus, potassium calcium, magnesium, iron, zinc, manganese, molybdenum, sulphur, etc., are essential for the normal and healthy growth of plants. these are called plant nutrients. nitrogen, phosphorus and potassium are the essential plant nutrients consumed in large quantities. continuous cultivation from the soil makes it poorer and poorer in materials supplying nitrogen, phosphorus and potassium to plants and become less productive and ultimately infertile. thus, in order to maintain soil fertility, it is necessary to add materials containing nitrogen, phosphorus and potassium in the form of fertilizers. fertilizers are of two types . 1. natural fertilizers 2. artificial fertilizers natural fertilizers :-these contain animal waste such as blood, bones, horns, lather waste, fish scrap, excreta, night soil, sewage sludge, tankage, guano, etc., and decayed plants such as cotton seed meal, wood or tobacco stem ashes, oil cakes and green growing plants buried in the soil, etc. artificial or chemical fertilizers :- chemical substances which are added to the soil as to make up the deficiency of essential elements are called chemical fertilizers. substance to be used as fertilizer must have following characteristics. it should (i) be soluble in water. (ii) be fairly stable. (iii) be easily assimilated by plants. (iv) not disturb ph of the soil. (v) be cheap. nitrogeneous fertilizers:- the important nitrogeneous fertilizers are :- (i) ammonium suplhate. (ii) calcium cyanamide. (iii) calcium ammonium nitrate. (iv) basic calcium nitrate. (v) urea.",
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d2264ca9493746f133fb8c48c67d177b | please tell me about your cbse physics tutors in bahrain? | askiitians.com | 2021.21 | [
{
"text": "hi, the students who live abroad often feel troubled with finding a good guides / teachers for cbse physics preprations. askiitians has taken initiative to guide students in bahrain for physics for cbse as well as engineering exams. all the teachers are ex-iitians and they have deep insight knowledge into the subject matter. not only this, but also you get complete study material, dpps and test series. along with getting guidance for cbse physics in bahrin, you can also prepare for enginnering exams. please check, cbse physics tutors in bahrain . thanks! vijya",
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eb41726873bb5470d35bad1b3bd2c1ee | best 5 branches of iit kharagpur | askiitians.com | 2021.39 | [
{
"text": "the best five branches of iit kharagpur are civil engineering computer science & engineering electrical engineering electronics & electrical communication engineering mechanical engineering best of luck hope this has helped you!!!!!!!!",
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ea454e19fd38f9e3f2926a6594082d30 | a de-shelled egg is placed in concentrated salt solution for some time. what will happen? why? | askiitians.com | 2021.31 | [
{
"text": "dear student eggs are covered with a semi-permeable membrane, which allows water molecules to pass through. when you put a de-shelled egg into a salt water solution, water molecules pass from the egg, through this membrane, into the salt water solution … this will continue to happen till the water density on both sides is the same. since the egg is losing water, it will shrink. in other words, the egg is not actually losing any material … other than water. regards",
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"text": "the shell of an egg is a semi-permeable membrane that can allow water molecules and other small molecules to move in and out of the shell. when the egg is placed in pure water, water molecules will move into the egg through the process of osmosis causing the egg to grow lager",
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{
"text": "because the salt in the solution draws out the water in the egg, due to a difference in solute concentrations.",
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{
"text": "when the egg is placed in pure water , water molecules will move into the egg through the process of osmosis causing the egg to grow lager. ... this is because, the cells of the membrane of the egg shell will be denatured by the heat and die off and will not allow water molecules to pass through it by osmosis",
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ba80f19d31f6d73c991fef3b41552f29 | integrate cos4x-1/cotx-tanx .kindly give me answer please help me | askiitians.com | 2021.31 | [
{
"text": "∫ (cos4x -1/(cotx-tanx)) dx = ∫ (cos4x -1/(cosx/sinx - sinx/cosx)) dx = = ∫ (cos4x -1/(cos^2x - sin^2x)/sinx.cosx)) dx = ∫ (cos4x -1/(cos2x/sin2x/2)) dx = = ∫ (cos4x -sin2x/2cos2x) dx = ∫ (cos4x - tan2x/2) dx = = -sin4x/4 + ln(cosx) + c",
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|
139f55b6c8f0a993f6a82b7dc5e1d8a4 | is physics for iit-jee and other engineering entrance examinations (volume - 1&2) good for preparing for iit jee if not can you suggest one book | askiitians.com | 2021.21 | [
{
"text": "hc verma and resnik halliday as far as i know i havent started reading but the the seniors refer it",
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{
"text": "you have to follow hc verma book with rgukt meterial as mechanics because in rgukt they were given very high difficault questions.",
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|
99a20f1c54be70ddacd7182f0a9b50df | what is calorie? | askiitians.com | 2021.31 | [
{
"text": "calorie is a unit of energy where 1calorie=4.18joule\n1joule=0.24calorie\nplease approve the answer by clicking yes if you liked it",
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|
77b94679af249d22e82e54ea7efb914f | sir i am sc candidate how much marks i need to qualify in ipu cet.i am outsider delhi | askiitians.com | 2021.43 | [
{
"text": "http://www.askiitians.com/iit-jee/main/cut-off.html http://www.askiitians.com/iit-jee/advanced/cut-off.html",
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336603d2b34d33493a0fdb879c75a2df | what is the condition of toppling n whn does it takes place?plz explain | askiitians.com | 2021.31 | [
{
"text": "dear jayesh, for toppling to occur the torque must act on one side and the normal must shift away from the centre of mass. best of luck...!!!! cracking iit just got more exciting,it’s not just all about getting assistance from iitians, alongside target achievement and rewards play an important role. askiitians has it all for you, wherein you get assistance only from iitians for your preparation and win by answering queries in the discussion forums. reward points 5 + 15 for all those who upload their pic and download the askiitians toolbar, just a simple to download the toolbar…. so start the brain storming…. become a leader with elite expert league askiitians thanks aman bansal askiitian expert",
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"text": "i would rather say that for toppling to occur, the vertical(or mg) from the centre of gravity should lie outside the body. the higher the object ant the less area in contact of body with the plane, more the possibility of toppling since for toppling, tan(theta) >= a/h",
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397cc31573adbd084022e9f9196af272 | f(x)= x÷sinx in (0,p÷2) check the monotonicity? | askiitians.com | 2021.21 | [
{
"text": "f(x)= x/sinx df/dx = (sinx - xcosx)/ (sinx)^2 a function is monotonic if it is either increasing or decreasing in the given range. hence, check the sign of df/dx. df/dx = (tanx - x)cosx/(sinx)^2 tan x - x> 0 for (0,pi/2) . you may check it by making the graph. cosx>0 for (0,pi2) hence, df/dx>0 for(0,pi/2) hence, this function is monotonic in the given range.",
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e465ead9bb0036b0c7f8ec22c20425c2 | 10. if k and l shells of an atom are full, then what would be the total number of electrons in the atom? | askiitians.com | 2021.43 | [
{
"text": "number of electrons k shell can hold = 2 number of electrons l shell can hold = 8 hence, when both the shells are full, the total number of electrons present = 2 + 8 = 10 electrons.",
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4657c55e0025b5833750dbbd8d6386eb | a horizontal conveyor belt is running with constant speed v=3.0m/s .a small disk enters the horizontal velocity vo=4.0 m/s perpendicular to the velocity of the belt . coefficient of friction between the disk and the belt is 0.5. q1.what should be the maximum width of the belt so that disk does not fall it? q2.what is the minimum speed of the disk relative to the reference frame fixed with the ground? | askiitians.com | 2021.43 | [
{
"text": "max. width-2.5m min. speed of disk-3m/s",
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7f4942e455da91042211b96a1282dd8c | my air is 2524 wht should i choose cse/electrical at it bhu or maths and computing at iit kgp | askiitians.com | 2021.43 | [
{
"text": "mathematics and computing has certainly good prospects and fetches good salary and in no way is inferior to cse/ee . however, most of it is your personal choice too. which college you want or your interests.",
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2029479cefd4bbfe65db5a62c409672b | how to solve this diffrential calculus problem? please provide solution it is urgent! | askiitians.com | 2021.31 | [
{
"text": "differentiate each side wrt x we get cosy dy/dx = cos (a+y) - xsin(a+y) dy/dx replace x from original equation, rearrange dy/dx, dy/dx (cosy + sin(a+y) siny/cos(a+y)) = cos(a+y) multiply both sides by cos(a+y) dy/dx (cosycos(a+y) +sinysin(a+y)) =(cos(a+y))^2 dy/dx(cos(a+y-y)) =(cos(a+y)) ^2 so, dy/dx = cos^2(a+y)/cosa hence proved",
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7e6679bef9a9c7c97d5198309ac6d989 | how to prepare for ts eamcet in 3 days to score atleast 100 marks | askiitians.com | 2021.25 | [
{
"text": "byheart all the formulae",
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},
{
"text": "revise the synopsis of all lessons! start with chemistry first year and second year, then mathematics both years if possible! physics at last if time permits ! that`s it u can score 80 above",
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"text": "believe you can get marks and work hard that makes you to get marks it`s 100% helpful",
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29fce2adc37f8eea802f92cc604dd3da | what is positive hydrostatic pressure gradient and negative hydrostatic pressure gradient? | askiitians.com | 2021.39 | [
{
"text": "hi parth, thank you for asking hydrostatic pressure is the pressure exerted by a fluid at equilibrium at a given point within the fluid due to the force of gravity. so, positive pressure is exerted toward the grvity and negetive pressure exerted against the gravity. now, gradient is the actually the difference in levels. for e.g., pressure gradient (difference in pressure ), concentration gradient (difference in concentration) etc. hope i answered the question.",
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d0b6ab9f0d6b5a1aa3466b91eaed0d06 | which college should i choose vit vellore or iet lucknow? | askiitians.com | 2021.31 | [
{
"text": "vit vellore.",
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{
"text": "iet lucknowwwwwwwwwwwwwwwwwwwwwwwwww 11110000000 times better than vit",
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|
5b7651cc12ea1b6ca691a9a4cd5b6f97 | sir wud u please tell me the general acidic strength order of the followings groups of compounds: alcohols, phenols, carboxylic acids, aldehydes, ketones, ethers | askiitians.com | 2021.21 | [
{
"text": "dear anmol, acidic strength is mainly the ability to release a proton in a reaction. more stable the resulting product after deprotonation, the more stronger the acid is. so, the order you asked will be like this, ethers<ketones<aldehydes<alcohols<phenols<carboxylic acids carboxylic acids & phenols are stabilised by resonance delocalisation of charge after deprotonation. so they're the stronger ones. please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee preparation. all the best !!! regards, askiitians experts himanshu geed",
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|
aeb7a0924ffcf8576171dcf067ba3642 | principal of superposition of gravitation | askiitians.com | 2021.31 | [
{
"text": "dear baba principle of superposition simply states that resultant gravitational force on a point mass will be equal to the sum of gravitation force exerted by individual point masses in the system. all the best akash goyal askiitiansexpert-iitd please feel free to post as many doubts on our discussion forum as you can. we are all iitians and here to help you in your iit jee preparation. now you can win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian.",
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{
"text": "acording to this principal net gravitational force acting on a particle due to other particles is vector sum of all the forces......... f net =f1 +f2 +f3................ fn (all forces should be taken in vector form) this law is equally valid for all conservative forces like magnetic forces,electrostatic forces etc......",
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] |
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fae637ae11df008327a5b29332dc6241 | calculate the percentageof p character in the orbital occupied by the lone pair of electrons in water molecule if cos (104.5) is -0.25 | askiitians.com | 2021.31 | [
{
"text": "%",
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},
{
"text": "you can calculate the answer by using the formula- cos a = p-1/p , where p denotes the fraction of p charater",
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] |
|
a314467c24cd6657e5650c0d11893951 | arrange the following in increasing order of first ionization enthalpy: mg, al, si, na | askiitians.com | 2021.39 | [
{
"text": "the electronic configurations of na and mg are: na (11): [ne] 3s 1 and mg (12): [ne] 3s 2 in both the atoms, the electron is to be removed from 3s-orbital but nuclear charge in na is less than mg. thus, ionisation energy of na is less than mg (na the electronic configurations of mg and al are: mg: [ne] 3s 2 ; al: [ne] 3s 2 3pl in mg, the electron is to be removed from 3s-orbital while in al, it is to be removed from 3p-orbital. since it is easier to remove an electron from 3p-orbital in comparison to 3s-orbital, the ionization enthalpy of mg is higher than al (mg > al). the electronic configurations of al and si are: al (13): [ne] 3s 2 3p 1 si (14): [ne] 3s 2 3p 2 in both the atoms, the electron is to be removed from 3p-orbital but nuclear charge in si is more than al. thus, ionisation enthalpy of al is less than si na al",
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] |
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f13fee0354ac1d33b61f8b03610a401d | name the unit in which the calorific value of a fuel is expressed. | askiitians.com | 2021.31 | [
{
"text": "dear student kilo joules per kg (kj/kg) thanks",
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}
] |
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047d59f71fdac000770c799fe83192b9 | i am taking admission in an nit...............wanna give jee next year ................can sum1 tell me how to manage all this???? | askiitians.com | 2021.25 | [
{
"text": "hi vicky, according to me,preparing for jee while studying in nit is quite a tough thing to do,but still u can manage to do so as many students hav done dat before,, for dis u hav to manage ur time very effectively n in my opinion u must n't involve in extracurrics der n must utilise ur weekends for dis purpose..one thing i can say one thing for sure dat weekends r going to be very crucial.......so be a little serious abt dese things..",
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979ba6fc1a979b2e4ed9150e3aac0b31 | if the current i through a resistor is increased by 100 % (assume that temperature remains unchanged), the increase in power dissipated will be [ncert exemplar problems] (a) 100% (b) 200% (c) 300 % (d) 400 % | askiitians.com | 2021.31 | [
{
"text": "answer: c",
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2177f327fccc7c68f2fd9d718cbbf86e | explain ionic solid are hard and brittle | askiitians.com | 2021.39 | [
{
"text": "ionic crystals are hard because the positive and negative ions are strongly attracted to each other and difficult to separate, however, when pressure is applied to an ionic crystal then ions of like charge may be forced closer to each other. the electrostatic repulsion can be enough to split the crystal, which is why ionic solids also are brittle.",
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5fd6acf1b297c90e506c7a5de32d034f | what is the difference between breathing and respiration?(proper definition plzz..) | askiitians.com | 2021.31 | [
{
"text": "we define breathingas the expansion and contraction of the ribcage (chest) using the muscles located in between the ribs. the muscles consist of the meat eaten when people have ribs from pork or whatever animal. the diaphragmis another muscle which participates in this process. diaphragam is a thin layer of muscle, separating the thoracic cavity from theabdominal cavity. when the diaphragm moves downwards it pulls air into the body as if it was the plunger of a syringe.once air, containing the valuable oxygen (about 20%) is inside the lungs, the oxygen is transported, via bloodstream, to the cells all over the body, where respiration takes place. now,respirationis the reaction that converts oxygen and glucose into carbon dioxide, water and releases energy to be used elsewhere!",
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0ec33727b3c3b925061c06eff7629c7c | dicot stem importance differences betwwen monocot and dicot stems where monocot stem can be observedmeans in which plants | askiitians.com | 2021.43 | [
{
"text": "hello student you can jump into the following link for getting the required information. http://www.askiitians.com/biology/plant-kingdom/angiosperms.html#classification http://www.askiitians.com/forums/10-grade-science/why-monocot-plants-ans-dicot-plants-are-grown-alte\\_110993.htm i hope it helps.",
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e17c30d682975876f3a6ea38b7c11542 | 1) when light passes from one medium to other, then which of the following may change? a) velocity and frequency b) frequency and colour c) velocity, wavelength and colour d) velocity and wavelength | askiitians.com | 2021.25 | [
{
"text": "c",
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},
{
"text": "c) velocity,wavelength and colour",
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38bf34cb1db93d0a97c19fcbab1f371a | evaluate the following integral ∫ sqrt{(1 + cos 2x) / (1 – cos 2x)} dx | askiitians.com | 2021.25 | [
{
"text": "ans: hello student, please find answer to your question below",
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|
1d16348721d75215e402fa99701f7037 | i am appearing for jee-1o and would like to enquire about the minimum rank to get mechanical engineering in top seven iits.also is electrical engineering has more scope then mechanical engineering in terms of job prospectus?? | askiitians.com | 2021.21 | [
{
"text": "dear ankit opening and closing rank for mechanical branch opening rank closing rank iit mumbai 109 556 iit delhi 416 683 iit kanpur 409 791 iit chennai 320 876 iit kharagpur 793 1056 iit roorkee 1173 1668 iit guwahati 1624 2188 in terms of placement both mechanical and electrcal has almost same scope please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee preparation. all the best. regards, askiitians experts badiuddin",
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d0b189860e6ece2711f3d3a8da430382 | three forces p,2p,3p acting along the three sides of an equilateral triangle in the same order .then find the resultant | askiitians.com | 2021.25 | [
{
"text": "dear madhuri you resolve the components of the force. net force in x direction is : p-2pcos60-3p cos60 i net force in y direction: 2psin60-3psin60 resultant will be sqrt of the sum of the squares of the two forces. regards arun",
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] |
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cf8384942feee5e7efc4ff0000c0d956 | name some devices in which electric motors are used. | askiitians.com | 2021.39 | [
{
"text": "dear student electric motor is used in all such devices where electric energy is used, converted into mechanical energy to get the motion of machine. e.g. it is used in electric fans, mixer grinders, coolers, a.c., washing machines, computers etc. thanks",
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] |
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7bcefcffc57ff5f2a19f900a7f96ce31 | my first preference is mechanical then eee, kindly suggest me for this branches of old iits branch selection | askiitians.com | 2021.31 | [
{
"text": "fill choices during counselling you will get branch acc to your rank",
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] |
|
09a8dd647580475781c1fb712b1bdb06 | sir i am expecting 63 marks in jee advanced in sc category.whether i will get any iit seat or not? | askiitians.com | 2021.43 | [
{
"text": "your question is already answered before.. please dont spam thanks bharat bajaj askiitians faculty",
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|
89979388c3f473647678f9a67318f418 | sir i have got 56294 overall rank in aieee 2010 and overall state (up) rank 8186 .sir could you please tell me which branchand institute i will getin aieee 2010 | askiitians.com | 2021.21 | [
{
"text": "dear ashutosh, nit is difficult at your rank. check out the opening and closing rank for collages under aieee: http://www.askiitians.com/aieee-counselling/aieee-engineering-counsellings.aspx please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. askiitians expert amit yadav now you can win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian.",
"name": "",
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},
{
"text": "hi , but you can try for bit patna, deogarh and other good private collages of your state. all the best!",
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}
] |
|
b76de7d10518aa7cdacce44a50064a72 | i am student of class 10, i recently crack ftre with national rank 3559 and i want to take admission in pinnacle program pleze give me some information about this program ??? | askiitians.com | 2021.39 | [
{
"text": "hi mayank prakash, it is good that you scored well and the program is also good, and you can also takle help from askiitians for your preparations they are also provided 2 year course for preparations with comrehensive study material and test series regards",
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|
7e222969c1dd09228d9ca1d134b686b7 | according to hubble's law, the redshift(z) of a receding galaxy and its distance r from earth, what is relation of z and r ? | askiitians.com | 2021.39 | [
{
"text": "dear arun according to hubble’s law- z = hr where h is hubble constant. hence z is proportional to r regards arun (askiitians forum expert)",
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|
2a913681c250a68596cae185033cad81 | at what temperature is the root mean square speed of an atom in an argon gas cylinder is equal to the root mean square of a helium gas at -20℃ | askiitians.com | 2021.39 | [
{
"text": "dear student temperature of the helium atom, t he = –20°c = 253 k atomic mass of argon, m ar = 39.9 u atomic mass of helium, m he = 4.0 u let, ( v rms ) ar be the rms speed of argon. let ( v rms ) he be the rms speed of helium. the rms speed of argon is given by: (v rms )ar = sqrt (3rtar/ mar) (v rms )he = sqrt (3rthe/ m he ) equating two equal tar = t he /m he * mar => 253/4 * 39.9 => 2.52 *10^3 k",
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|
a4c359a41b1505ade1db475b28394363 | can you please give me the best foreign author books for jee preparation for physics chemistry and maths. the most popular ones | askiitians.com | 2021.31 | [
{
"text": "please find the detailed list http://www.askiitians.com/important-books-iit-jee.aspx",
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|
a82c1fefb3a73c1d9aae4217ea48fc3e | why is ko2 paramagnetic ? | askiitians.com | 2021.43 | [
{
"text": "ko2 is a superoxide in which, only one electron is released from the dioxygen atom and a superoxide ion is represented as 02 . so, in ko2 the oxygen atoms bear -1/2 oxidation state and they also behave as a free radical species, having an unpaired electron. we know that a molecule becomes paramagnetic due to the presence of unpaired electrons. hence, ko2 behaves as paramagnetic molecule.",
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{
"text": "ko2 is a superoxide which containd odd number of electrons (unpaired electron). therefore ko2 is paramagnetic in nature.",
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},
{
"text": "the superoxides of o2 is paramagnetic because of one odd no. of electron or one unpaired electron in pi*2p molecular orbital",
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},
{
"text": "ko2 is superoxide which contain odd number of electrons ( unpaired electron) . therefore ko2 is paramagnetic in nature.",
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},
{
"text": "ko2 is a superoxide which contains odd number of electrons or unpaired electrons. .therefore it is paramagnetic in nature",
"name": "",
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{
"text": "dear student ko 2 is a superoxide in which, only one electron is released from the dioxygen atom and a superoxide ion is represented as 0 2 - . so, in ko 2 the oxygen atoms bear -1/2 oxidation state and they also behave as a free radical species, having an unpaired electron and we know that a molecule becomes paramagnetic due to the presence of unpaired electrons. so, ko 2 behaves as paramagnetic molecule. i hope this answer will help you. thanks & regards yash chourasiya",
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|
a7b11043c32acf153cd9d2cbbd4ed99c | q. stanley miller and harold c. urey performed an experiment by recreating in the laboratory the probable condition of the atmosphere of the primitive earth. i) what is the purpose of the experiment ii) in what forms was the energy supplied to the chemical reactions to occur? | askiitians.com | 2021.31 | [
{
"text": "hello student in primitive time at the time of formation of earth there was a non oxygenated atmosphere of ch 4 , nh 3, co 2 ,co, no 2 , h 2 o etc. due to cooling and compression caused by increased pressure the chemical reacted compressed againt each other and cooled to form the first life on earth in water.",
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|
1624f844a3fa9668ea3f91aff91c9ce9 | a man and his wife appear for an interview for two posts. the probability of husband’s selection is (1/7)and that of the wife’s selection is (1/5). find the probability that only one of them will be selected. | askiitians.com | 2021.39 | [
{
"text": "probability that only one of them is selected is given by =(1/7)(4/5)+(1/5)(6/7) =2/7. thanks & regards jitender singh iit delhi askiitians faculty",
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},
{
"text": "probability that only one of them is selected is given by =(1/7)(4/5)+(1/5)(6/7) =2/7. thanks & regards jitender singh iit delhi askiitians faculty",
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|
fa9f32825678ff00855caaadffa039f4 | 0 to the power 0 = 1 or 0? we say anything to the power 0 is one... | askiitians.com | 2021.39 | [
{
"text": "0 to the power 0 becomes an indeterminate form and not equal to 1.",
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},
{
"text": "0 to the power zero is indeterminate form,it is not defined.... similarly 0/0,infinity/infinity, are also not defined",
"name": "",
"is_accepted": false
}
] |
|
4f915f19aa5f5bfa17dc6f78fd5f94a9 | a capacitor has capacitance c. is this information sufficient to know what maximum charge the capacitor can contain ? if yes, what is this charge? if no, what other information is needed ? | askiitians.com | 2021.25 | [
{
"text": "maximum charge is stored in principle at time t=∞. therefore the maximum charge stored will be ec where e is the emf of the cell connected & c is the capacitance. therefore to find maximum charge stored in a capacitor emf of the cell should also be known.",
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}
] |
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598cc4891d1b654c07511d87dd9bb3cb | a person connects four 1/4 ohm cells in series but one cell has its terminal reversed. the external resistance is 1 ohm. if each cell has an emf of 1.5 v the current flowing is - a) 4/3 a b) 3/4 a c) 1.5 a d) zero | askiitians.com | 2021.31 | [
{
"text": "resistance of all the cells connected in series gets added up with the external resistance to give an effective resistance of 2ohms.the emf of three cells in series with same polarity gets added up to give resultant emf of 4.5v.now the emf of the cell connected with opposite polarity is subtracted to give the effective emf of 3v. 3v/2ohm=1.5amp which is the electric current in the circuit.",
"name": "",
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},
{
"text": "your answer is correct but i want to know that instead of potential difference you used emf in ohm’s law . shou;ld’nt we have to calculate p.d first in order to calculate current.",
"name": "",
"is_accepted": false
},
{
"text": "effective emf is 4.5v/2 ohm=2.25a.due to opposite polarity 3 cells added i.e.4.5v if it is same polarity then emf will 6v & for one cell opposite polarity 6v-1.5v=4.5v akanksha",
"name": "",
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},
{
"text": "here four 1/4ohm cells are connected in series with external resistance 1ohmso effective resistance=1/4+1/4+1/4+1/4+1 =2ohmnow each cell has an e.m.f of 1.5 volt but one cell has its terminal reversed so it exert negative force so total p.d= 1.5+1.5+1.5-1.5=3volt. and then the current flow =v/r =3/2=1.5 aaman arya",
"name": "",
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}
] |
|
aa1a9f64338d0763fabf8a4839bb553a | equalent resistance please solve the following question | askiitians.com | 2021.25 | [
{
"text": "dar ashwin the case illustrated is a case of infinite series whose each repeating step is double the prior step. let the r eq =r (let) then the equivalent resistance after the first sep may me written as 2r. redraw the cir cuit then we get that the vertical resistance r is in parallel with 2r. thus the equivalent resistance between will be equal to 2r + (2rr)/(2r+r) = r (as asuumed earler that equivalent resistance between a & b is r). this leads to a quadratic equation whose solution comes as (5 +root41)r/4",
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] |
|
3fed525bdbbc88146fbaa336f9003c02 | a vessel of volume v=5 litre contains 1.4 gm nitrogen and 0.4 gm helium at 1500k. if 30% of the nitrogen molecules are dissociated into atoms then find gas pressure.(assume t constant) | askiitians.com | 2021.43 | [
{
"text": "hi.. first of all calculate the total number of moles of the molecules in the undissociated case for the given amounts of the two gases. and find the pressure corresponding to them. finally, calculate the no. of molecules dissociated and also the total number of undissociated molecules and then calculate the pressure corresponding to that. hope this helps you out. regards",
"name": "",
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] |
|
6d8992c6e409acc9f2f4a271dcd25229 | while antacids and antiallergic drugs interfere with the function of histamines, why do these not interfere with the function of each other? | askiitians.com | 2021.21 | [
{
"text": "dear student, specific drugs affect particular receptors. antacids and anti-allergic drugs work on different receptors. this is the reason why antacids and anti-allergic drugs do not interfere with each other’s functions, but interfere with the functions of histamines. regards sumit",
"name": "",
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}
] |
|
dc14b87ba03f0f135a3b5a3835c20f73 | question is attached in the image (alts-1 q9) | askiitians.com | 2021.31 | [
{
"text": "sum of any two forces can not be less than third force. hence answer is 4",
"name": "",
"is_accepted": false
}
] |
|
81d7a742a44b3922b492aca165425126 | why should a thermometer bulb have small heat capacity | askiitians.com | 2021.25 | [
{
"text": "a thermometer bulb should have small heat capacity. in case, it has large thermal capacity, the temperature of the substance will get lowered due to the large amount of heat absorbed by the thermometer bulb.",
"name": "",
"is_accepted": false
}
] |
|
a034dd9ced0dc4b47285c3c627b6e4a2 | q. what is sectered by corpus leutium? | askiitians.com | 2021.21 | [
{
"text": "hello student corpus leutium is the matured ovum covered by yellow fat. it secreted a secondary sex hormone called progestrone. it secretes by posterior lobe of pituitary gland.",
"name": "",
"is_accepted": false
}
] |
|
9deb14f0258d420584241f1454c02864 | can you please suggest good books for only current electricity?? | askiitians.com | 2021.25 | [
{
"text": "for iit??",
"name": "",
"is_accepted": false
},
{
"text": "yeah for iit and other engg entrance exams.",
"name": "",
"is_accepted": false
},
{
"text": "yes..the book woulb be sufficient for both jee mains and advanced.",
"name": "",
"is_accepted": false
},
{
"text": "for iit solve hcv completely first.....then go for dc pandey electromagnetism......and if u think u are able to solve more difficult problms go for ie irodov..",
"name": "",
"is_accepted": false
}
] |
|
4a141be792fa30a665b6b6ddf80461d1 | q. how has agrobacterium tumifaciens been suitably modified to act as a cloning vector? | askiitians.com | 2021.25 | [
{
"text": "hello student the tumor inducing plasmid of agrobacterium tumifaciens has now been modified into a cloning vector which is no more pathogenic to the plants but still able to use the mechanism to deliver genes od our interest into variety of plants",
"name": "",
"is_accepted": false
}
] |
|
6e1c91e33d18a604c5e3b86cfc90602d | since reproductive processes such as pollination and fertilization are independent of water, seed formation is more dependable(class 12 pg 37).can any one plz explain did ststement | askiitians.com | 2021.25 | [
{
"text": "in the text book it is given that the pollintion and fertilization process are indepedent of water (does not require water). where as seed formation (requires pollination and fertilization process) is dependent on fertilization and pollination. iam here with attaching the text book lines for reference.",
"name": "",
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},
{
"text": "sorry sir,l can`t understand. plz explain the terms dependable and independent in these paragraph.l mean why is it dependable",
"name": "",
"is_accepted": false
},
{
"text": "so whether it indicates that seed formation,fertilisation, pollination takes place even in dry areas and offer advantages to angiosperms.then wat about seed formation in gymnosperm",
"name": "",
"is_accepted": false
},
{
"text": "for seed formation in all the plants fertilization is required (union of male and female gametes) so seed formation is dependent on fertilization. water not required for fertilization (independent) microspore (male) and mega spore(female)-lower plants- bryophytes,pteridophytes and gymnosperms pollen and ovule-angiosperms",
"name": "",
"is_accepted": false
},
{
"text": "since in angiosperms in most of the cases pollination and fertisation don't require any water to complete transfer n fusion of gametes as in thallophytes n other lower groups of plants.",
"name": "",
"is_accepted": false
}
] |
|
40f7d999552ac777f4589be35d112a58 | spa delhi (b.arch / b.planning), nit trichy (b.arch), iit kharagpur (b.arch), iit roorkee (b.arch), iit guwahati (b.des) - which is the most preferred one ? | askiitians.com | 2021.21 | [
{
"text": "dear tuhina, being an iitian i would suggest iit kharagpur and 2nd preference should be iit roorkee. please feel free to post as many doubts on our discussion forum as you can.we will get you the answer and detailed solution very quickly. all the best. regards, askiitians experts sagar singh",
"name": "",
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] |
|
2d5a11627649b174b6b58f0c8c605a70 | number of nodal planes in all the three types of p orbital | askiitians.com | 2021.25 | [
{
"text": "dear ashish the three dimensional space around the nucleus in an atom where the probability of finding an electron is maximum ( around 95 % ) is called an atomic orbital. if a three dimensional surface is drawn enveloping the space where 95 % of probability of finding an electron exists, it termed the shape of that atomic orbital. with the help of schrodinger wave equation the values of are calculated. the variation of 2 with distance 'r' from the nucleus can be estimated and when these values are plotted as a function of 'r' we get the physical picture of the shape of atomic orbital. the size of the orbital incraeses in the order 1s < 2s < 3s. the orbital in which the elctrons having quantum numbers n=2 and l =1 are present is called a 2p orbital. similarly the orbital having electrons with quantum number n =3 and l=1 is called 3p orbital . all the p orbitals have the common azimuthal quantum number value l=1 and n can have values 2,3,4,... there are three p-orbitals in each principal quantum number starting from 2 . these are mutually perpendicular to each other and oriented along the three axes. each p- orbital is of dumb- bell shape . using the values of 2 when the radial probability distribution for 2px orbital can be represented in figure , the probability of finding an electron at the nucleus is zero. at a certain distance from the nuclues the probability is maximum. this is marked ' m' in the curve and darkly shaded area in the change cloud diagram . for a p x orbital, yz plane is the nodal plane. on either side of the nodal plane, there are two spheroidal lobes along the x- axis. similarly p y orbital is along the y axis and its nodal plane is in xz plane . p z orbital is along the z axis with xy plane as its nodal plane. all the best. akash goyal askiitiansexpert-iit delhi please feel free to post as many doubts on our discussion forum as you can. we are all iitians and here to help you in your iit jee preparation. win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar respectively : click here to download the toolbar..",
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] |
|
43dcb6418f966a5923a581aacbb30d27 | application of a forward bias to a p-n junction (a) widens the depletion zone. (b) increases the potential difference across the depletion zone. (c) increases the number of donors on the n side. (d) increases the electric field in the depletion zone. | askiitians.com | 2021.31 | [
{
"text": "(c) number of donors is more because electrons from -ve terminal of the cell pushes (enters) the n side and decreases the number of uncompensated pentavalent ion due to which potential barrier is reduced. then eutralised pentavalent atom are again in position to donate electrons.",
"name": "",
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}
] |
|
d64b203230d69fe6e81634335c057e20 | place commas correctly and write the numerals: twenty three lakh thirty thousand ten. | askiitians.com | 2021.31 | [
{
"text": "dear student the numeral of twenty three lakh thirty thousand ten is 23,30,010 thanks",
"name": "",
"is_accepted": false
}
] |
|
8861d5c85515afbe66d2fdf52a07d21f | i hope to get into nit trichy through state rank. i am also hopeful of getting a dual at bits pilani goa campus. in trichy however my branch would be one of the lower ones. which would be better. what should i go for bits or nitt ? | askiitians.com | 2021.25 | [
{
"text": "dear rahul, trichy is far better college than bits, goa. if you have a confusion regerding these two college blindly take admission in trichy as all the corses taught here are the core one and do have a very secure future. regarding pilani i wont say any thing as its among the best college and is even beter than some of the iits. the corses you would be getting at pilani are not core and hv less future prospects as you will have to go for further study after opting 4 thiose branch. so i would strongly recommend you to go to trichy, thank you",
"name": "",
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}
] |
|
ce6e4317297cef3542f7a38df720ef02 | explain with examples: atomic number explain with examples: atomic number | askiitians.com | 2021.31 | [
{
"text": "dear student atomic number: the atomic number of an element is equal to the number of protons in the nucleus of its atom. thanks",
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"is_accepted": false
}
] |
|
c13011950576f239d91ebf36d9541a7f | sir..which is better in terms of placement nd salary..aerospace or navel arch. at iit madras??do iit madras have overseas placement? | askiitians.com | 2021.21 | [
{
"text": "hi , between naval arch and aerospace .. i think the naval is better coz aerospace aero has less opputunites in india... iit madras placement procedure the placement campaign for iit madras is conducted through a certain procedure. iit madras sends the placement invitation letters to companies and organizations along with the employer registration form required to be filled in by the company. the filled up forms have to be sent back to the institute by the interested organizations. the information is then made available for the students online along with relevant information. interested candidates are then required to submit their resumes which are sent to the companies by the institute. the organizations shortlist candidates based on the information on the resume. the aptitude, technical test, personal interviews and group discussion are held on the specified and fixed dates. the offer letters for selected candidates are sent to the placement office which is then handed over to the candidate. iit madras placement record the placement track record of iit madras shows an upward trend that specifies the increase in demand for iit qualified candidates every year. iit madras is visited by a large number of companies and organizations every year who wish to tap into the brilliant resource pool of talent. like the other iit institutes, the demand for iit qualified candidates from iit madras surpasses the number of candidates available to fill up the vacancies. major placement organizations at iit madras iit madras candidates are in great demand among all major companies and organizations. iit madras is considered as a pool of brilliant talents and intellectuals. the iit madras placement campaigns are attended by many important companies and organizations for recruitment. some of the main companies frequently come for iit madras placements include mckinsey, analog, cosmic circuits, lehman brothers, capital one, reliance industries, google india, murugappa group, deloitte, credit suisse, deutsche bank, shell, zazu networks, morgan stanley, manhattan associates, arcot, ittiam systems, l & t, covansys, ge, satyam computers, sabre travel and c-dot. dominant trend in placement through iit madras iit madras has always seen a trend of candidates electing for the core engineering programs to ensure a career for themselves in the it industry. nowadays, students are also opting for management programs and specialization in marketing areas on a large scale. iit madras has also marked an increase in candidates opting for placement in finance and consultancy companies. thanks and all the best !! naval aero has less opputunites in india",
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}
] |
|
c000fa87045e27bfebe0d8e60cf6e75b | hi i am bit confused about the branch should i go for electrical in bombay or cs in kanpur, what are the pros and cons of choosing one over other. regards | askiitians.com | 2021.25 | [
{
"text": "electrical is a wide branch and less focus than cs, it cover whole lot of areas than cs, you can think cs as a subranch of electrical, untill unless you have love for coding i will advise you to go for electrical at bombay. sher mohammad faculty askiitians b.tech iit delhi",
"name": "",
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}
] |
|
d131594baf0562b16025d20214a583b6 | the shape of l - t graph of simple pendulum is, (a) curve (b) parabola (c) straight line (d) hyperbola | askiitians.com | 2021.21 | [
{
"text": "for a simple pendulum, where, and are the period, length and acceleration due to gravity, respectively. the graph of the period as a function of the length of the pendulum is a parabola.",
"name": "",
"is_accepted": false
}
] |
|
ebb41510da205e5d11defdb8936f1241 | i have got 7700 rank in jee adv 2015,if i take a drop can i get arank within 3000?please suggest how should i prepare. | askiitians.com | 2021.21 | [
{
"text": "try to get admission this year itself ,and ya it is possible to get even below 1000 if you have determination, and dont join any coaching this year,it will be better if you prepare from home and just enroll in test series in some good institute approve if u like",
"name": "",
"is_accepted": false
}
] |
|
17fde40fed334337cd87d7129bc2e8df | how about an exact solution for the position of a planet as a function of time? | askiitians.com | 2021.21 | [
{
"text": "dear student please ask questions related to iit jee syllabus we will happy to help you . good luck cheers",
"name": "",
"is_accepted": false
}
] |
|
50145676132bbbbe1dfe994c7e6355f8 | which is better in terms of placement usit vs mait vs jamia | askiitians.com | 2021.31 | [
{
"text": "in terms of placement wise jamia is far better. thanks & regards aarti gupta askiitians faculty",
"name": "",
"is_accepted": false
}
] |
|
75504aea8d4479142a60e3a9915b5315 | i am appearing this year in aieee. i want to know how many marks is generally required to get into nit durgapur ? | askiitians.com | 2021.25 | [
{
"text": "aieee cut off 2009 nit durgapur opening and closing rank - aieee 2008 branch name quota allotted under category opening rank closing rank bio technology ai ob 24541 27247 ai op 12011 19438 ai sc 75145 99919 ai st 140646 177916 hs ob 48671 54628 hs op 24575 29409 hs opph 372169 372169 hs sc 111125 115683 hs st 210604 276620 chemical engineering ai ob 20209 21076 ai op 12023 14957 ai sc 85415 89914 ai st 143529 143529 hs ob 38488 46094 hs op 19008 23658 hs sc 98157 104938 hs st 291124 292122 civil engineering ai ob 18583 18794 ai op 10791 13347 ai opph 182590 182590 ai sc 63542 74546 ai st 118444 124298 hs ob 30838 41936 hs op 20228 23522 hs sc 92336 107477 hs st 233490 233490 computer science & engineering ai ob 9076 11357 ai op 5493 7904 ai sc 29952 46567 ai st 62897 62897 hs ob 15360 20313 hs op 8265 13980 hs opph 164115 164115 hs sc 48021 61262 hs st 105597 111765 electronics & communication engineering ai ob 10088 10969 ai op 1526 7645 ai sc 28819 43848 ai st 50167 103951 hs ob 13385 18390 hs op 8190 12403 hs opph 27611 27611 hs sc 48383 60295 hs st 121437 121437 electrical engineering ai ob 12090 14345 ai op 7927 10869 ai opph 153790 167152 ai sc 52627 66299 ai st 111795 124014 hs ob 21604 37004 hs op 11257 16432 hs opph 178862 178862 hs sc 69059 83197 hs st 193485 232214 information technology ai ob 12680 13739 ai op 8248 10003 ai sc 41664 53392 ai scph 258894 258894 ai st 128110 142863 hs ob 35189 43367 hs op 15790 22266 hs opph 259936 259936 hs sc 75465 96582 hs st 144168 168056 mechanical engineering ai ob 11795 15086 ai op 7870 11302 ai opph 148389 184324 ai sc 44042 69416 ai st 72555 111412 hs ob 21432 35307 hs op 13131 18738 hs sc 72716 89026 hs st 127250 176968 metallurgical engineering & material science engineering ai ob 22654 24115 ai op 12361 18023 ai sc 91593 105810 ai st 166635 166635 hs ob 42675 47916 hs op 21711 25195 hs opph 365412 365412 hs sc 109080 114386 hs st 222817 297684 expected marks expected rank above 375 top 10 374-330 11-500 329-300 501-1000 299-255 1001-5000 254-225 5001-10000 224-195 10001-20000 194-175 20001-30000 174-150 30001-50000 149-125 50001-75000 124-110 75001-100000 below 109 >100001",
"name": "",
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}
] |
|
2b70fdfa3e6861f59291052209cb5a03 | if f(x) = [cos(x) + 5cos(3x) + cos(5x)]/[cos(6x) + 6cos(4x) + 15cos(2x) + 10] then find the value of f(0) + f'(0) + f''(0) | askiitians.com | 2021.25 | [
{
"text": "hint.: try to find out first and second derivate of f(x) seperatly and then to find the f(0) and other put x = 0. thanks.",
"name": "",
"is_accepted": false
}
] |
|
8e1626dd7ce86e199691000cfe16a0f6 | when acetyl chloride is reduced in d presence of pd and baso4 then what is d final product | askiitians.com | 2021.43 | [
{
"text": "it is rosenmund reduction that u r asking acetyl chloride ----------------------------- acetaldehyde +hcl (h 2 ,pd/baso 4 ) this reagent is also known as lindlar catalyst and very important i advice u to take a book sn sanyal for reactions and reagents , it is very good approve if useful",
"name": "",
"is_accepted": false
}
] |
|
806e3853ebfcf7b8c08faab250efd302 | how does the reason explain the given assertion?????????? | askiitians.com | 2021.39 | [
{
"text": "d",
"name": "",
"is_accepted": false
}
] |
|
44d8675cc0de62704ed8a27c45f84e84 | hello! i am studying in 10th class right now and i will join a coachng institute to prepare for iit-jee 2013. please tell which is the best coaching institute among these- 1. bansal classes, kota. 2. resonance, kota. 3. fiitjee, delhi. 4. vibrant, kota | askiitians.com | 2021.39 | [
{
"text": "dear student all are good. in kota join bansal in delhi you should try for vmc also. batches are small there and teachers are good. all the best. akash goyal askiitiansexpert-iit delhi please feel free to post as many doubts on our discussion forum as you can. we are all iitians and here to help you in your iit jee preparation. win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar respectively : click here to download the toolbar..",
"name": "",
"is_accepted": false
},
{
"text": "of course bansal classes is the best option.as i had also joined its previous batch.here management of entire study material along with its efficient teachers is well.",
"name": "",
"is_accepted": false
}
] |
|
99a57fb3ec1b424a435a286371cd3d57 | ..........................,..................(just to reach minimum character limit | askiitians.com | 2021.21 | [
{
"text": "we are given that . consider a prime that divides p. then it has to divide q 2 r 2 i.e. it also divides at least one of q and r. suppose the prime s divides p and q, but not r. further let the highest power of s that divides p (denoted by v s (p) ) be k 1 and v s (q) = k 2 . wlog . then we have v s (pqr) = k 1 +k 2 and v s (p 2 q 2 +q 2 r 2 +r 2 p 2 ) = min (2k 1 +2k 2 , 2k 2 , 2k 1 ) = 2k 1 . and from the fact that pqr divides (p 2 q 2 +q 2 r 2 +r 2 p 2 ) we have and hence we must have k 1 = k 2 . so if p = p’s k and q = q’ s k we can divide throughout by s 2 k and hence obtain that we need p’q’r’|(p’ 2 q’ 2 +q’ 2 r 2 +r 2 p’ 2 ). so let us therefore assume that all primes that divide precisely two of p,q,r have been divided out this way. so, we now have a prime t that divides all three, with v t (p) = n 1 , v t (q) = n 2 and v t (r) = n 3 . and wlog so, v t (pqr) = and v t (pqr) = (p 2 q 2 +q 2 r 2 +r 2 p 2 ) = min [2(n 1 +n 2 ), 2(n 2 +n 3 ), 2(n 3 +n 1 )] = 2(n 1 +n 2 ). so, we need that . we already have and . and hence it easily follows that r|pq and q|pr and p|rq i.e. that",
"name": "",
"is_accepted": false
},
{
"text": "i forgot to add that since any prime that divides precisely two of p,q,r appears to eqyal power in the two numbers they will cancel out even in pq/r, qr/p, and pr/q. hence only need to concern ourselves with primes that divide all three of p,q,r",
"name": "",
"is_accepted": false
}
] |
|
1ea2405132befef5c9516b1160b20d32 | do i have to write both justification and steps of construction for a 3mark question?? | askiitians.com | 2021.43 | [
{
"text": "yes",
"name": "",
"is_accepted": false
}
] |
|
ca812fb58d8bab5cb3d6de71f1099569 | sir i hav hcv doubt of page 163 q 50 55 5657 64 | askiitians.com | 2021.31 | [
{
"text": "hii asking doubts is good but it will be better if you also provide the source from where you have asked n specify it if it is from askiitians module. .. . . .. . .thanks",
"name": "",
"is_accepted": false
},
{
"text": "this doubts are from hc verma page 163 q 55 57 58 64",
"name": "",
"is_accepted": false
}
] |
|
ee93f31c6144ed6a1d607bee869fc40c | an object moving with the velocity 16 m/s comes to rest after 8 secs. what is the final velocity? | askiitians.com | 2021.25 | [
{
"text": "dear student when an objects comes at rest then obviously its final velocity is 0. hope it helps regards arun",
"name": "",
"is_accepted": false
}
] |
|
d7dfb7047f77f518d5006f9202595913 | my aieee b.arch rank is 5000 4 da general category n 7000 overall. plz suggest me where cn i get admission. also my nata score is 108. | askiitians.com | 2021.25 | [
{
"text": "hii nits are difficult to capture but you can go on n crack the idea of private college giving barch degrees. best of luck in your endeavours for other queries related to iit jee you can contact us at 0120-4616500 or you can email us at support@askiitians [dot]com",
"name": "",
"is_accepted": false
}
] |
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