1.

Two soap bubbles, each of radius r, coaleses in vacuum under isotermal conditions to from a bigger bubble of radius R. Then R is equal toA. `2^(-1//2)r`B. `2^(-1//3)r`C. `2^(1//2)r`D. 2r

Answer» Correct Answer - C
`4pir_(1)^(2)+4pir_(2)^(2)rArr4piR^(2)`
`R=sqrt(2r)`


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