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Question: The amount of work done in forming a soap film of size \(10 \mathrm {~cm} \times 10 \mathrm {~cm}\)i...

The amount of work done in forming a soap film of size 10 cm×10 cm10 \mathrm {~cm} \times 10 \mathrm {~cm}is (Surface tension

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Answer

Explanation

Solution

E=T×ΔA=3×10−2×2(100×10−4)=6×10−4JE = T \times \Delta A = 3 \times 10 ^ { - 2 } \times 2 \left( 100 \times 10 ^ { - 4 } \right) = 6 \times 10 ^ { - 4 } J