36. A mercury drop of radius 1cm is sprayed into
108 drops of equal size. The energy expended in joules is (surface tension of Mercury is 460 x 10-3N/m
(a) 0.057 (b) 5.7
(c) 5.7 x 10-4 N/m (d) 5.7 x 10-6 N/m
Ans. a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a