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Find the excess pressure inside a soap b...

Find the excess pressure inside a soap bubble of radius 5 mm. (surface tension is 0.04 `N//m`).

Text Solution

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Radius r=5 mm = `5 times 10^-3` m.
Surface tension `S_T=0.04 N//m`
`=4 times 10^-2 N//m`
Excess pressure inside soap bubble
`P=(4.S_T)/r`
`thereforeP=(4times4times10^-2)/(5times10^-3)=(4times4times10)/5=32 Pascal`
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