The surface tension of soap solution is ...

The surface tension of soap solution is 0.035 N/m . The energy needed to increase the radius of the bubble from 4 cm to 6 cm is

A

`1.8xx10^(-3)` J

B

`1.8xx10^(-2)` J

C

`3.6xx10^(-2)` J

D

`1.8xx10^(-4)` J

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The correct Answer is:

A

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