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What will be the pressure inside a small...

What will be the pressure inside a small air bubble of 0.1 mm radius situated just below the free surface of water ? Surface tension is 72 dyne `cm^(-1)` and atmospheric pressure is `1.013xx10^(6)` dyne `cm^(-2)`.

Text Solution

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We are given: `P_(a)=1.013xx10^(6)" dyne "cm^(-2),S=72" dyne "cm^(-1)`
`R=0.1mm=10^(-2)` cm
We are to calculate, Pressure, P
Using relation, `P-P_(a)=(2S)/(R)`
We have, `P-P_(a)=(2S)/(R)=1.013xx10^(6)-:(2xx72)/(10^(-2))=1.027xx10^(6)" dyne "cm^(-2)`
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