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Question: The work done in blowing a soap bubble of 10cm radius is (surface tension of the soap solution is \(...

The work done in blowing a soap bubble of 10cm radius is (surface tension of the soap solution is 3100N/m\frac{3}{100}N/m)

A

75.36×10−475.36 \times 10^{- 4}J

B

37.68×10−437.68 \times 10^{- 4}J

C

150.72×10−4150.72 \times 10^{- 4}J

D

75.36 J

Answer

75.36×10−475.36 \times 10^{- 4}J

Explanation

Solution

W=8πR2T=8π(10×10−2)23100=75.36×10−4JW = 8\pi R^{2}T = 8\pi(10 \times 10^{- 2})^{2}\frac{3}{100} = 75.36 \times 10^{- 4}J