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MHT CET Physics question

PhysicsMechanical Properties of FluidsMHT CET

'W₁' is the work done in blowing a soap bubble of radius 'r' from a soap solution at room temperature. The soap solution is then heated and second soap bubble of '2r' is blown from the heated solution. If 'W₂' is work done in forming the second bubble, then [MHT-CET 2022]

Answer: (D)

Solution

, so at the same T the second bubble would need ; heating lowers T, hence ; (a) needs

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Question ID VK-062247