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8. The amount of work done in blowing a soap bubble such that its diameter increases from d to D is (T= surface tension of the solution)

(a) 4π(D²-d²)T

(b) 8π(D²-d²)T

(c) π(D²-d²)T

(d) 2π(D²-d²)T

Ans. d

(8)

5/5 - (1 vote)

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