JEE Main Physics question

Statement 1: When ice on the polar caps of earth melts, the duration of the day increases. Statement 2: constant.

(A)Assertion is True, Reason is True; Reason is the correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is NOT the correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

Melting polar ice redistributes mass from the poles toward the equator (as meltwater spreads into the oceans globally), increasing earth's effective moment of inertia about its spin axis. By conservation

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Question ID VK-158806