If the surface tension of a liquid is $T$,the gain in surface energy for an increase in liquid surface by $A$ is

The amount of work done to break a big water drop of radius $R$ into $27$ small drops of equal radius is $10 \ J$. The work done required to break the same big drop into $64$ small drops of equal radius will be (in $J$)

The potential energy of a molecule on the surface of a liquid compared to one inside the liquid is

$A$ soap bubble of radius $r$ is blown up to form a bubble of radius $2r$ under isothermal conditions. If $T$ is the surface tension of the soap solution, the energy spent in the blowing is: (in $\pi T r^2$)

$1000$ small water drops of equal size combine to form a big drop. The ratio of final surface energy to the total initial surface energy is

$A$ liquid drop of diameter $D$ breaks into $27$ tiny drops. The change in energy is