Explain why
A drop of liquid under no external forces is always spherical in shape

A mercury drop is. spherical in shape. Why?

Why does a small mercury drop assume a spherical shape?

Small liquid drops assume sherical shape because

Explain why rain drops are spherical while the surface of water in a pond is flat.

A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, the work done in the process will be

You may have seen in a circus a motorcyclist driving in vertical loops inside a ‘death-well’ (a hollow spherical chamber with holes, so the spectators can watch from outside). Explain clearly why the motorcyclist does not drop down when he is at the uppermost point, with no support from below: What is the minimum speed required at the uppermost position to perform a vertical loop if the radius of the chamber is 25 m?

When there is no external force, the shape of a small liquid drop is determined by:

Does a single external force acting on a particle necessarily change its kinetic energy? Explain.

A liquid has a definite volume but not shape of its own. Explain.

A spherical liquid drop of 4mm diameter is given a charge of 2 * 10^-10 coulomb. If nine such drops coalesce to form a single drop, calculate the potential of the new drop.