6. A pin or a needle floats on the surface of water, the reason for this is
(a) Surface tension
(b) Less weight
(c) Upthrust of liquid
(d) None of the above
Ans. a
(13)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (126)