Mechanical Properties of Fluids Quiz 1

Which of the following is correct ?

The surface of a liquid (of uniform density p) in a container is open to the atmosphere. The atmospheric pressure is $P_0$ . The pressure $\rho$gh, at a depth h below the surface of the liquid, is called the

Rain drops or liquid drops are spherical in shape, especially when small, because

The surface tension acts

A thin ring of diameter 8 cm is pulled out of water (surface tension 0.07 N/m). The force required to break free the ring from water is

A matchstick 5 cm long floats on water. The water film has a surface tension of 70 dyn/cm. A little comphor put on one side of stick reduces the surface tension there to 50 dyn/cm. The net force on the matchstick is

A big drop of radius R is formed from 1000 droplets of water. The radius of a droplet will be

The work done in breaking a spherical drop of a liquid (surface tension T) of radius R into 8 equal drops is

If for a liquid in a vessel, the force of cohesion is more than the force of adhesion,

If a liquid does not wet a solid surface, its angle of contact with the solid surface is