The excess of pressure,due to surface tension,on a spherical liquid drop of radius $R$ is proportional to

The excess pressure inside a soap bubble is three times that of another soap bubble. The ratio of their volumes is:

$A$ big drop is formed by coalescing $1000$ small identical drops of water. If $E_1$ be the total surface energy of $1000$ small drops of water and $E_2$ be the surface energy of the single big drop of water,then the ratio $E_1 : E_2$ is $x : 1$,where $x = . . . . . . $.

When a large bubble rises from the bottom of a water lake to its surface,its radius doubles. If the atmospheric pressure is equal to the pressure of a water column of height $H$,then the depth of the lake will be

The excess pressure inside a soap bubble is twice the excess pressure inside a second soap bubble. The volume of the first bubble is $n$ times the volume of the second,where $n$ is:

Write the equation of excess pressure (pressure difference) for a bubble in air and a bubble in water.