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CSS Solved Papers
Physics Chemistry

Engineering :: Fluid Mechanics and Solid Handling


  A soap bubble of initial radius r is to be blown up. The surface tension of the soap film is ?. The surface energy needed to double the diameter of the bubble without change of temperature is
[A]. 4?2?[B]. 12?2?
[C]. 24?2?[D]. 16?2?

Answer: Option C


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