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MHT CET Physics question

PhysicsMechanical Properties of FluidsMHT CET

The work done in blowing a soap bubble of radius R is 'W' at room temperature. Now the soap solution is heated. From the heated solution another soap bubble of radius 2R is blown and the work done is 'W'. Then [MHT-CET 2019]

Answer: (B)

Solution

, so for the same temperature , but surface tension decreases on heating, hence $ <

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Question ID VK-062326