What will be the work done in blowing a ...

What will be the work done in blowing a soap bubble of radius 1 cm to 2 cm ?
(If surface tension of soap solution is ` 25 xx 10^(-3)` N/m)

A

`6 pi xx 10^(5)` J

B

` 6 pi xx 10^(6)` J

C

` 24 pi xx 10^(-5)` J

D

` 20 xx 10^(6)` J

Text Solution

Verified by Experts

The correct Answer is:

A

`dE = 4pi T (R_(2)^(2)-R_(1)^(2))`
` = 25.12 xx 25 xx10^(-3) xx10^(-4) xx3 = 6 pi xx10^(-5)` J

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