Question

Calculate work done in blowing a soap bubble of diameter  2cm, given that the surface tension of soap solution is 28×10−3N/m is
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Answer 1

Answer:

W = 28.1344 x 10^-5 J

Explanation:

W = T ∆A

T = 28 x 10^-3

A = 2 x 4πR²

R = 2cm = 2/100 m

T = 8 x 3.14 x 2/100 x 2/100

T = 100.48 x 10^-4

T = 1.0048 x 10^-2

W = 28 x10^-3 x 1.0048 x 10^-2

W = 28.1344 x 10^-5 J

Answer 2

Answer:

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