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The surface tension of a soap solution i...

The surface tension of a soap solution is `0.03Nm^(-1)` . How much work is done in producing soap bubble of radius `0.05m` ?

Text Solution

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Surface area `(Delta s) = 4pi r^2 = 4 xx 3.14 xx (0.05)^2`
` Delta s = 0.0314 m`
No. of surface area of a soap bubble = 2
(outer and inner area)
Total surface energy ` = 2 T Delta S`
` = 2 xx 0.03 xx 0.0314 `
`E = 0.0018 J`
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