The excess pressure in a first soap bubble is three times that of another soap bubble. Then the ratio of the volume of the first bubble to the other is:

Due to surface tension, the excess pressure inside a smaller drop is $9$ units. If $27$ smaller drops of the same liquid combine, then the excess pressure inside the bigger drop is (in $units$)

$A$ glass capillary tube of inner diameter $0.28 \ mm$ is lowered vertically into water in a vessel. The pressure to be applied on the water in the capillary tube so that the water level in the tube is the same as that in the vessel (in $N/m^2$) is:
Surface tension of water $= 0.07 \ N/m$
Atmospheric pressure $= 10^5 \ N/m^2$

Two soap bubbles have different radii but their surface tension is the same. Mark the correct statement.

Two water drops each of radius $r$ coalesce to form a bigger drop. If $T$ is the surface tension,the surface energy released in this process is

When a mercury drop of radius $R$ breaks into $n$ droplets of equal size,the radius $r$ of each droplet is