39. A drop of mercury of radius 2 mm is split into 8 identical droplets. Find
the increase in surface energy. (Surface tension of mercury is 0.465 J/m2 )
(a) 23.4 μJ (b) 18.5 μJ
(c) 26.8 μJ (d) 16.8 μJ
Ans. a
(12)
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