Physics, asked by goldikthakur, 6 months ago

A rectangular wire frame of size 2cm×2cm, is dipped in a soap solution and taken out. a soap film is formed, if the size of the film is changed to 3cm × 3cm, calculate the work done in the process. The surface tension of soap film is 3×10² N/m.​

Answers

Answered by priyapugalendhi0312
3

Answer:

Data A

1

=2×2cm

2

=4×10

−4

m

2

,

A

2

=3×3cm

2

=9×10

−4

m

2

,T=3×10

−2

N/m

As the film has two surfaces, the work done is

W=2T(A

2

−A

1

)=2(3×10

−2

)(9×10

−4

−4×10

−4

)=3.0×10

−5

=30μJ.

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