MHT CET 2024 Physics question
The work done in blowing a soap bubble of radius R is 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 . Then
Answer: (C)
Solution
The work done in blowing a soap bubble equals the increase in surface energy: (a soap bubble has two free surfaces). At room temperature . For the larger bubble from the heated solution, , so
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