A small soap bubble of radius $4\,cm$  is trapped inside another bubble of radius $6\,cm$ without any contact. Let $P_2$  be the pressure inside the inner bubble and $P_0$  the pressure outside the outer bubble. Radius of another bubble with pressure difference $P_2 - P_0$  between its inside and outside would be....... $cm$

The excess of 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

If a section of soap bubble (of radius $R$) through its center is considered, then force on one half due to surface tension is

The diameter of rain-drop is $0.02 \,cm$. If surface tension of water be $72 \times {10^{ - 3}}\,newton$ per metre, then the pressure difference of external and internal surfaces of the drop will be

A long cylindrical glass vessel has a small hole of radius $'r'$ at its bottom. The depth to which the vessel can be lowered vertically in the deep water bath (surface tension $T$) without any water entering inside is

A soap bubble, blown by a mechanical pump at the mouth of a tube, increases in volume, with time, at a constant rate. The graph that correctly depicts the time dependence of pressure inside the bubble is given by