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A motivation screensaver for all IIT aspirants. Download here: http://bit.ly/10JyrMM Enjoy! :) ...
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The men square deviation of a set of n observations x1,x2,x3,.....xn about a point c is defined as \left(1/n \right)\sum_{i=1}^{n}{\left(x_{i}-c \right)^{2}} The mean square deviation about -2 and 2 are 18 and 10 respectively ...
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1. INTEGRATE A)∫dx/x22(x7-6) B)∫dx/(x+3)8/7(x-2)6/7 C) ∫(lnx-1)/((lnx)2-1)dx ...
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What was the cutoff for VITEEE in 2011. Please tell me rank v/s marks analysis if you have proper Information. I got this http://www.myengg.com/engg/info/2138/viteee-2010-cutoffs-rank-predictor/ Are these right cutoffs. And a ...
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Sorry if this is silly, If sound travels faster in solids than in air then why on closing our ears we cannot hear the sound properly? ...
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A current of dry air was bubbled through a bulb containing 26.6 g of an organic substance in 200 gms of water, then through a bulb at the same temperature containing pure water and finally through a tube containing fused calc ...
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When a mixture of NaBr and NaCl is repeatedly digested with H2SO4, all the halogens are expelled and Na2SO4 is formed quantitatively. With a particular mixture, it was found that the weight of NaBr-NaCl mixture taken. calcula ...
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A mixture of H2O(v), CO2 and N2 was trapped in a glass apparatus with a volume of 0.731 ml. The pressure of total mixture was 1.74 mm of Hg at 23°C. The sample was transferred to a bulb in contact with dry ice(-75°C) so tha ...
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A mixture of H2O(v), CO2 and N2 was trapped in a glass apparatus with a volume of 0.731 ml. The pressure of total mixture was 1.74 mm of Hg at 23°C. The sample was transferred to a bulb in contact with dry ice(-75°C) so tha ...
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Two solids components A and B dissociate into gaseous products at 20°C as i) A(s) → A'(g) + H2S(g) ii) B(s) → B'(g) + H2S(g) At 20°C pressure over the excess solid A is 50 mm Hg and that over excess solid B is 68 mm Hg. ...
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An open vessel at 27°C is heated until the 3/5 of the moles of the air in it has been expelled. Assuming that the volume of the vessel remains constant, what is temperature to which the vessel has been heated. a) 27°C b) 30 ...
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Let x={a1,a2,a3,......,a6} and y={b1,b2,b3}. Then number of functions f from x to y such that it is onto and there are exactly three elements in x such that f(x) =b1, is a) 75 b) 90 c) 100 d) 120 Ans: (d) Please explain how t ...
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\lim_{n->infinity}(\sum_{r=1}^{m}{r^{n}})^{1/n} is equal to: (n belongs to Natural nos.) a) m b) m/2 c)em d)em/2 Ans: (a) please tell me the method to solve this..... (SOURCE ARIHANT DIFF CALC.) ...
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\int_{0}^{x}{f(t)d(t)} ----> 5 as |x| ---> 1, then value of 'a' so that the equation 2x + \int_{0}^{x}{f(t)d(t)} = a has at least two roots of opposite signs in (-1,1) is a) 0<a<1 b) 0<a<3 c) -1<a<∞ ...
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Question: f(x)=(2x-∩)3 +2x - cosx. Then the value of |f'(f-1(x))| at x=∩ is _______? answer: 1/3 I think drawing the graph is only way. Any accurate and easier solution please tell me. (SOURCE: ARIHANT) ...
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*Image* In above figure note the hybridization of Nitrogen and sulfur mentioned.... Do you find mistakes? *Image* Again, note hybridization of Nitrogen.... Don't you find any blunders? *Image* sp2 Hybridization for Nitrogen a ...
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A tank contains 100 Litres of an aqueous solution containing 10 Kg of salt water is entering in the tank at the rate of 3 Litres per minute and the mixture is flowing out at 2 litre per minute, the concentric is maintained un ...
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If \vec{a},\vec{b},\vec{c} are non-co-planar unit vectors such that \vec{a} x ( \vec{b} x \vec{c} ) = (\vec{b}+\vec{c})/(\sqrt{2}) , \vec{b} and \vec{c} are non parallel, then find the angle between \vec{a} and \vec{b} . ...
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What is Range of f(x)=[1+sinx] + [2+ sin(x/2)] + [3+sin(x/3)]+........... + [n+ sin(x/n)] for all x belongs to [0,∩] where [.] denotes greatest integer function? ...
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When a particle is flying from the ground slowly upward against gravity. Since the kinetic energy is zero throughout the process what is bringing the change in potential energy? ...
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Go to: http://www.youtube.com/watch?v=dbh5l0b2-0o Great video! ...
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BMAT Full Syllabus Test 1 : got 270 marks. How is it?? ...
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This group needs more active members...... Noone is available for clearing doubts except 1 or 2.... :( ...
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Is paper in aieee offline and online same? If yes how can they conduct it like that offline paper is conducted on 30th! and online on 7 to 25. So this is unfair! ...
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The heart of a man pumps 4 liters of blood per minute at pressure of 130 mm of mercury. If the density of mercury is 13.6 g/cm3 then calculate the power of heart. (g=9.8m/s2) ...
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Can anyone explain reciprocal system of vectors? Its the only topic I am not understanding properly! :/ ...
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Value of k for which 4x2+4x+1=0 has exactly one point of intersection with k-|x+(1/2)| is equal to: a) 1 b) 2 c) 3/2 d) 3/4? ...
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Is there any website where we can ask doubts for JEE and they answer soon for free or for money less than 100 rs?? ...
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If Sn=(1.2)/3! + (2.22)/4! + (3.23)/5! +...............upto n terms. Then find sum of infinite terms. ...
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nth term of a series can be written as ar= f(r) - f(r-1), then Sn= \sum_{r=1}^{n}{a_{r}} =f(n) - f(0) and S∞= *Image* Sn , then Value of \sum_{r=1}^{infinity}{(4r-1)5^{r}/(r^{^{2}}+r)} is?? ...
