Recently Active Questions

Look at the image I have uploaded. The Earth is pushing the space layer. Einstein used this to define gravity. He said that if an object of smaller mass would be somewhere around the space where the earth made the layer hollo ...

The electric strength of air is 2*107 NC-1. The maximum that a metallic sphere of diameter 6 mm can hold is: (a)3 nC (b)20 nC (c)1.5 nC (d)2 nC ...

From a circular disc of radius R and mass 9M, a small disc of radius R/3 is removed. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through O is: (a)4MR2 (b)40MR2/ ...

Four 2 kg masses are connected by 0.25 m spokes to an axle.A force of 24 N acts on a lever 0.5 m long to produce angular acceleration x. The magnitude of x in SI units is: (a)24 (b)12 (c)6 (d)3 ...

In a third order determinant, each element of the first column consists of two terms, each element of the second column consists of sum of three terms and each element of the third column consists of four terms. Then it can b ...

A cube of side length a is kept on top of a hemisphere of radius r.For the body to be in stable equilibrium for small displacements what should be the maximum value of a?? ...

Consider a matrix whose entries are integers. Adding a same integer to all entries on a same row, or on a same column, is called an operation. It is given that, for infinitely many positive integers n , one can obtain, throug ...

Chlorine molecules are 1.0% dissociated at 975 K at a pressure of 1.0 atm(1.0% of the pressure is due to Cl atoms). Cl2→2Cl Calculate Kp and Kc. ...

A sample of 20g of a compound (m.w=120)which is a non electrolyte is dissolved in 10g of ethanol.if the vapour press of the ethanol at the temp. used is 0.250 atm what is the vapour pressure os the ethanol above the sol. ? a) ...

What do the left gap and the right gap in a meter bridge mean? Q: In a meter bridge with a standard resistance of 5Ω in the left gap the ratio of balancing lengths of the bridge wire is 2:3 the unknown resistance is? ...

in how many ways can a number whose no of factors is N be divided into product of three factors... ...

A plate made up of anisotropic material is circular in shape at temperature T0 . The coefficient of thermal expansion are αxand αyin two mutually perpendicular directions.When heated slightly the shape of the plate will be ...

What to do and what not to do in the last month before IIT-JEE http://www.youtube.com/watch?v=Z5-AfiJxjOc&context=C4acfebbADvjVQa1PpcFMQX-FKsRHXxJDA7RTt_k4sN1NL6Iapsuo= ...

The acceleration of a particle is given by a(t)=(3.00m/s2)-(2.00m/s3)t. (a)Find the initial speed vosuch that the particle will have the same x-coordinate at t=5.00s as it had at t=0. (b)What will be the velocity at t=5.00s? ...

Area of triangle ABC if position vector of A is a position vector of B is b and position vector of C is c Area= (axb+bxc+cxa)/2 Prove the above relation. ...

a body is thrown vertically upwards. if air resistance is to be taken into account,then the time during which the body rises is a)equal to the time of fall b)less than the time of fall c)greater than the time of fall d)twice ...

In a reaction NH4NO2 → N2(g) + 2H2O (l) the volume of N2 after 20 mins and after a long time is 40ml and 70ml respectively ...the value of rate const is: a)(1/20)ln(7/4) /min b)(2.303/1200)log(7/3) /sec c)(1/20)log(7/3) /mi ...

Identical particles of charge q and mass m are fixed at the corners of a cube .One of the charges is released.What is its kinetic energy when it is far off from the rest of the charge?? ...

Some operations which can be performed on a capacitor are defined below : A : Connect the capacitor to a battery of emf E B : Disconnect the battery C : Reconnect the battery with polarity reversed D : Insert a dielectric sla ...

*Image* Consider a system as shown in the figure where the pulleys and the strings are ideal... m1=1kg m2=2kg m3=.5kg a)if frictionless find the acceleration of all the masses... b)friction between each of the bodies is 0.1 c ...

WBJEE was tougher this time ...

Find f(5), given f'(x)=1+1/x and f(1)=1 ...

IIT aspirants to go through two exams from 2013, JEE-Main and JEE-Advanced India TV Correspondent [ Updated 28 May 2012, 18:53:26 ] This was decided at a meeting of the Joint Councils of IITs, NITs, IIITs and other central ed ...

Is there any link to see aieee ranks by name? ...

for my friends.. ...

I am writing this post to all engineering aspirants. I want to make a very valid point so that you do not make the same mistakes as I did in+2... The first mistake is that all of us blindly start preparing for iitjee.Please t ...

Find the lim(x→0) 1. [ Sinx/x ] 2. [sinx]/x 3. [lim(x→0) Sinx/x ] where [.] represents greatest integer function ...

Show that the area of a right-angled triangle with all side lengths integers is an integer divisible by 6. ...

Note: This is a question for people from classes 7 to 10 A Helium balloon is accelerating up (yes, we all know this is possible. So this is not a hypothetical situation but a practical one). So, note these things: 1) The ball ...

given that for a reaction of first order n,the integrated form of the rate equation is : k=(1/t(n-1))[1/(Cn-1) - 1/(C0n-1)] where c0 and c are the values of the reactant concentration at the start of time t ...what is the rel ...