Mechanical Properties of Fluids

Question: The radius of a soap bubble is increased from $\frac{1}{\sqrt{\pi }}$ cm to $\frac{2}{\sqrt{\pi }}$ cm. If the surface tension of water is 30 dynes per cm, then the work done will be



1) 180 ergs
2) 360 ergs
3) 720 ergs
4) 960 ergs
Solution: Explanation: No Explanation
Surface tension surface energy

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