The work done in blowing a soap bubble of radius $r$ from a solution of surface tension $T$ is:

Explain surface energy and surface tension.

Two small drops of mercury each of radius $R$ coalesce to form a single large drop. The ratio of total surface energy before and after the change is -

Determine the ratio of the surface energy of $1$ large drop to $1000$ small drops, if $1000$ small drops combine to form $1$ large drop.

One thousand small water drops of equal radii combine to form a big drop. The ratio of final surface energy to total initial surface energy is

Let $W_1$ be the work done in blowing a soap bubble of radius $r$ from a soap solution at room temperature. The soap solution is now heated and a second soap bubble of radius $2r$ is blown from the heated soap solution. If $W_2$ is the work done in forming this bubble,then: