13. Small droplets of a liquid are usually more spherical in shape than larger drops of the same liquid because
(a) Force of surface tension is equal and opposite to the force of gravity
(b) Force of surface tension predominates the force of gravity
(c) Force of gravity predominates the force of surface tension
(d) Force of gravity and force of surface tension act in the same direction and are equal
Ans. b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a