Question

23. A rectangular wire frame of size
2 cm x 2 cm, is dipped in a soap solution
and taken out. A soap film is formed,
if the size of the film is changed to
3 cm x 3 cm, calculate the work done in
the process. The surface tension of soap
film is 3 x 10-2 N/m.
[Ans. 3 x 10-5 ]]​

Answer 1

Answer:

it turns into blue

Surface tension T=3\times10^{-2}\ N/mT=3×10

−2

N/m

A rectangular wire frame of size is

side a = 2 cm

A soap film is Formed,

If the size of the film is

side a '= 3 cm

We need to calculate the initial area

Using formula of area

A_{1}=a^2A

1

=a

2

Put the value into the formula

A_{1}=2^2\ cm^2A

1

=2

2

cm

2

A_{1}=4\ cm^2A

1

=4 cm

2

Explanation:

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