Why are free liquid drops and bubbles always spherical in shape ?

A liquid drop tends to assume a spherical shape because of

Small droplets of a liquid are usually more spherical in shape than larger drops of the same liquid because

why are liquids and gases categorised as fuids ?

Why do racer cars and birds have typical shape ?

Why are the atomic numbers and atomic mass numbers always in whole numbers ?

Let T_1 be surface tension between solid and air , T_2 be the surface tension between solid and liquid and T be the surface tension between liquid and air . Then in equilibrium, for a drop of liquid on a clean glass plate. The relation is ( theta is angle of contact )

Explain the shape of liquid drops on a solid surface with the help of diagram.

A spherical liquid drop is placed on a horizontal plane . A small distrubance cause the volume of the drop to oscillate . The time period oscillation (T) of the liquid drop depends on radius (r) of the drop , density (rho) and surface tension tension (S) of the liquid. Which amount the following will be be a possible expression for T (where k is a dimensionless constant)?

A large number of liquid drops each of radius 'a' coalesce to form a single spherical drop of radish b. The energy released in the process is converted into kinetic energy of the big drops formed. The speed of big drop will be