Question

A soap filled is formed when a rectangular wire plane of area 2cmX2cm is dipped in soap solution and taken out ,if the area of the filled is increased to 3cmX3cm centigrate calculate the work done in the process, circumstances of the soap filled is 3X10^-2 n by m​

Answer 1

Answer:

Data A1=2×2cm2=4×10−4m2,

A2=3×3cm2=9×10−4m2,T=3×10−2N/m

As the film has two surfaces, the work done is

W=2T(A2−A1)=2(3×10−2)(9×10−4−4×10−4)=3.0×10−5=30μJ.

Explanation:

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