Question

what is the pressure difference inside and outside a bubble of soap solution ?

Answer 1

Dear Student,

The pressure difference between the inside and outside of a bubble depends upon the surface tension and the radius of the bubble.
$$\begin{gathered} {\mathrm{P}}_{\mathrm{i}}-{\mathrm{P}}_0=\frac{4\mathrm{T}}{\mathrm{r}} \\ \mathrm{where},\mathrm{T}=\mathrm{surface}\mathrm{tension} \\ \mathrm{r}=\mathrm{radius} \end{gathered}$$