56. On account of melting of ice at the north pole the moment of inertia of spinning earth
(a) Increases
(b) Decreases
(c) Remains unchanged
(d) Depends on the time
Ans. a
(13)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)