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Under isothermal conditions two soap bub...

Under isothermal conditions two soap bubbles of radii a and b coalesce to form a single bubble of radius c. If external pressure is `P_e ` , the surface tension of soap solution is equal to :

A

`(P_e (a^3 +b^3 -c^3 ))/( 4(a^2 +b^2 +c^2))`

B

`(4 P_e (a^3 +b^3 -c^3))/( (a^2 +b^2 -c^2 ))`

C

`(4 P_e ( c^3-a^3 -b^3 ))/( (a^2 +b^2 -c^3))`

D

`(P(a^3 + b^3 -c^3))/((a^2 - b^2 - c^2))`

Text Solution

Verified by Experts

The correct Answer is:
C
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