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A water drop of diameter 2 cm is broken into 64 equal droplets. The surface tension of water is 0.075 N/m. In this process the gain in surface energy will be

1. 2.8 × 10 –4 J
2. 1.5 × 10 –3 J
3. 1.9 × 10 –4 J
4. 9.4 × 10 –5 J

Correct answer: 2.8 × 10 –4 J

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