A spherical drop of water has 1mm radius...

A spherical drop of water has `1mm` radius. If the surface tension of water is `70xx10^(-3)N//m`, then the difference of pressure between inside and outside of the spherical drop is:

A

`35 N m^(-2)`

B

`70 N m^(-2)`

C

`140 N m^(-2)`

D

Zero

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The correct Answer is:

C

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