MHT CET 2023 Physics question

If work done in blowing a soap bubble of volume 'V' is W then the work done in blowing the bubble of volume 2V from same soap solution is

(A)
(B) W
(C) W
(D) WCorrect

Answer: (D)

Solution

The work done in blowing a bubble equals the increase in surface energy: (a soap bubble has two surfaces), so . Since the volume is , , therefore \propto$

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Question ID VK-097851