MHT CET · Physics · Mechanical Properties of Fluids
A liquid drop having surface energy E is spread into 729 droplets of same size. The final surface energy of the droplets is
- A 6 E
- B 9 E
- C E
- D 3 E
Answer & Solution
Correct Answer
(B) 9 E
Step-by-step Solution
Detailed explanation
\( R^3 = 729 r^3 \implies R = 9r \) \( E_{final} = 729 \cdot 4\pi r^2 T = 729 \cdot 4\pi \left(\frac{R}{9}\right)^2 T \)
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