If work done in increasing the size of a soap film from $10\, cm\times6\, cm$ to $60\, cm\times11\, cm$ is $2\times10^{-4}\, J$. What is the surface tension ?
If work done in increasing the size of a soap film from $10\, cm\times6\, cm$ to $60\, cm\times11\, cm$ is $2\times10^{-4}\, J$. What is the surface tension ?
- A
$2\times10^{-8}\, Nm^{-1}$
- B
$2\times10^{-2}\, Nm^{-1}$
- C
$2\times10^{-4}\, Nm^{-1}$
- D
none of these
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