Mechanical Properties of Fluids

Question: The amount of work done in blowing a soap bubble such that its diameter increases from $d$ to $D$ is (T= surface tension of the solution)

1) $4\pi ({{D}^{2}}-{{d}^{2}})T$

2) $8\pi ({{D}^{2}}-{{d}^{2}})T$

3) $\pi ({{D}^{2}}-{{d}^{2}})T$

4) $2\pi ({{D}^{2}}-{{d}^{2}})T$

Solution:

Explanation: No Explanation

Surface tension surface energy

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