The modulus of elasticity is dimensionally equivalent to
strain
force
stress
coefficient of viscosity
Radius of an air bubble at the bottom of the lake is r and it becomes 2r when the air bubble rises to the top surface of the lake. If P cm of water be the atmospheric pressure, then the depth of the lake is
2P
8P
4P
7P
A manometer connected to a closed tap reads 4.5 × 105 Pa. When the tap is opened the reading of the manometer falls to 4 x 105 Pa. Then the velocity of flow of water is
7 ms-1
8 ms-1
10 ms-1
12 ms-1
What is the velocity v of a metallic ball of radius r falling in a tank of liquid at the instant when its acceleration is one-half that of a freely falling body ? (The densities of metal and of liquid are ρ and σ respectively, and the viscosity of the liquid is η)
The value of for one mole of an ideal gas is nearly equal to
2 J mol-1 K-1
8.3 mol-1 K-1
4.2 mol-1 K-1
2 cal mol-1 K-1
The volume of a metal sphere increases by 0.24 % when its temperature is raised by 40°C. The coefficient of linear expansion of the metal is
2 × 10-5
6 × 10-5
18 × 10-5
1.2 × 10-5
The temperature of equal masses of three different liquids A, B and C are 12°C, 19°C and 28°C respectively. The temperature when A and B are mixed is 16°C and when B and C are mixed is 23°C. The temperature when A and C are mixed is
18.2°C
22°C
20.2°C
24.2°C
A particle starts SHM from the mean position. Its amplitude is a and total energy E. At one instant its kinetic energy is . Its displacement at that instant is
A particle executes linear simple harmonic motion with an amplitude of 2 cm. When the particle is at 1 cm from the mean position the magnitude of its velocity is equal to that of its acceleration. Then its time period in second is
C.
Velocity = acceleration