Mechanical Properties of Fluids

Question: Radius of a soap bubble is $r$, surface tension of soap solution is $T$. Then without increasing the temperature, how much energy will be needed to double its radius

1) $4\pi {{r}^{2}}T$

2) $2\pi {{r}^{2}}T$

3) $12\pi {{r}^{2}}T$

4) $24\pi {{r}^{2}}T$

Solution:

Explanation: No Explanation

Surface tension surface energy

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