First slide

Surface tension and surface energy

Question

The excess of pressure inside a soap bubble than that of the outer pressure is

Moderate

A

$\frac{2 T}{r}$
B

$\frac{4 T}{r}$
C

$\frac{T}{2 r}$
D

$\frac{T}{r}$

Solution

The excess of pressure inside a soap bubble than that of the outer pressure is= $\frac{4 T}{r}$

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