The relative velocity between two layers of fluid, separated by 0.1 mm is `2 cm//s`. Calculate the velocity gradient.

The relative velocity between two layers of fluid, separated by 0.4 mm is 8 cm//s . What will be the velocity gradient?

The relative velocity of two parallel layers of water is 8 cm/sec. If the perpendicular distance between the layers is 0.1 cm, then velocity gradient will be

The velocity of the electron in the 1st Bohr orbit has a radius 0.53 A^@ is 2200 km//s . Calculate the frequency of revolution of the electron in the same orbit.

The phase difference between two points separated by 0.8 m in a wave of frequency 120 Hz is 90^(@) . Then the velocity of wave will be

An incompressible liquid flows through a uniform cross section tube with velocity 12 cm/s. the thickness of liquid layer is 0.8 cm then velocity of gradient of flow is

The relative velocity of two objects moving with same speed and in the same direction is

Two bodies of masses 3 kg and 2 kg collide head-on. Their relative velocities before and after collision are 15 m/s and 5 m/s respectively. The loss of kinetic energy of the system is

The terminal velocity of a water drop of radius 0.01 mm falling through air is 1.12 cm/s. If the density of air is neglected, the coefficient of viscosity of air is [density of water =10^(3) kg//m^(3), g=9.8m//s^(2)]

The phase difference between two particles in a medium separated by a distance x is pi //6 .If the frequency of the oscillation is 50 Hz and the velocity of propagation of the wave is 100 m/s then x =

A solid sphere of radius 20 cm and mass 25 kg rotates about an axis through its centre. Calculate its moment of inertia. If its angular velocity the torque applied changes from 2 rad s^-1 to 12 omega rad s^-1 in 5 sec, calculate the torque applied.