Physics Test - ...

A body floats in a liquid contained in a beaker. The whole system falls freely under gravity. The upthrust on the body due to the liquid is

A small drop of water of surface tension  is squeezed between two clean glass plates, so that a thin layer of thickness d and area A is formed between them. If the angle of contact is zero, then the force required to pull the plates apart is

A body of density ρ is dropped from rest at a height 'h' into a lake of density 'σ', where σ > ρ . Neglecting all the dissipative forces, calculate the maximum depth to which the body sinks before returning to float on the surface.

A small particle is released inside the depth of a liquid in the vessel. The volume of the particle is V. Density and viscosity of the liquid are ρ and η, respectively. Buoyant force on the particle is greater than the weight of the particle. The variation of velocity of the particle with time is

The excess pressure inside a spherical drop of water is four times that of another drop. Then, their mass ratio is

The Leaning Tower of Pisa does not fall because

If the Earth stops rotating, the value of g at the equator will

If Earth suddenly contracts to 1.5% of its present size, without any change in its mass, then how would the value of acceleration due to gravity change?

Kepler's second law states that the straight line joining a planet to the sun sweeps out equal areas in equal time. This statement is equivalent to the statement that

The angular velocity of a planet revolving in an elliptical orbit around the sun __________ when it comes near the sun