A particle falls from a height 'h' on a fixed horizontal plane and rebounds. If 'e' is the coefficient of restitution, the total distance travelled by the particle before it stops is
A disc of radius r is connected to a string of length L. The string is tied to a point on the circumference of the disc. This system is made to oscillate in vertical plane of the disc with a small angular amplitude θ0. Find the speed of the lowest point of the disc at the moment the string become vertical.
1 Crore+ students have signed up on EduRev. Have you? Download the App |
A long cylindrical volume contains a uniformly distributed charge of density ρ. The radius of cylindrical volume is R. A charge particle (q) revolves around the cylinder in a circular path. The kinetic energy of the particle is:
If and are two vectors satisfying the relation . Then the value of will be:
A small block of mass M moves on a frictionless surface of an inclined plane, as shown in figure. The angle of the incline suddenly changes from 60° to 30° at point B. The block is initially at least at A. Assume that collisions between the block and the incline are totally inelastic. (g = 10 m/s2)
If collision between the block and the incline is completely elastic, then the vertical (upward) component of the velocity of the block at point B, immediately after it strikes the second incline, is
A wire of length 2.5 m and area of cross section 1×10–6 m2 has a mass of 15 kg hanging on it. What is the extension produced? How much is the energy stored in the standard wire if Young’s modulus of wire is 2×1011 Nm–2.
Two soap bubbles A and B are kept in a closed chamber where the air is maintained at pressure 8 N/m2. The radii of bubbles A and B are 2 cm and 4 cm, respectively. Surface tension of the soap-water used to make bubbles is 0.04 N/m. Find the ratio nA/nB, where nA and nB are the number of moles of air in bubbles A and B, respectively. [Neglect the effect of gravity.]
(Round off upto 2 decimal places)
How many monochlorobutanes will be obtained on chlorination of n-butane?
The ratio of the molar amounts of H₂S needed to precipitate the metal ions from 20 mL each of 1M Cd(NO₃)₂ and 0.5 M CuSO₄ is
At 345 K, the half life for the decomposition of a sample of a gaseous compound initially at 55.5 kPa was 340 s. When the pressure was 27.8 kPa, the half life was found to be 170 s. The order of the reaction is ________. [integer answer]
The difference in oxidation state of chromium in chromate and dichromate salts is ______. (in integer)
The vapour pressures of A and B at 25°C are 90 mm Hg and 15 mm Hg, respectively. If A and B are mixed such that the mole fraction of A in the mixture is 0.6, then the mole fraction of B in the vapour phase is x × 10-1. The value of x is _________. (Nearest integer)
If the slope of the normal to the curve x3 = 8a2y, a > 0, at a point in the first quadrant is - 2/3, then the point is
If | z1 − 1 | < 1 , | z2 − 2 | < 2 , | z3 − 3 | < 3 then | z1 + z2 + z3 |
The order of the differential equation y(dy/dx)=x/(dy/dx)+(dy/dx)3 is
The order of differential equation (d2y/dx2)2 = (1+dy/dx)1/2 is
The number of solutions of the equation log(x + 1) (2x2 + 7x + 5) + log(2x + 5) (x + 1)2 - 4 = 0, x > 0, is ________.
Let A = and B = Then the number of elements in the set {(n, m) : n, m ∈ {1, 2 ..., 10} and nAn + mBm = l} is ___________.
Improve the sentence by choosing best alternative for capitalised part of the sentence.
Despite his old age, his movements were as spirited as A YOUNG MAN
Choose the alternative which best expresses the meaning of the idiom/phrase.
To be under a cloud
Improve the sentence by choosing best alternative for capitalised part of the sentence.
He has very good command ON English.
10 tests
|