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If the polar ice caps of the earth were ...

If the polar ice caps of the earth were to melt, what would the effect of the length of the day be?

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Earth rotates about its polar axis. When ice of polar caps of earth melts, mass.concentrated near the axis of rotation spreads out. Therefore, moment of inertia 'I' increases.
As no external torque acts, L`= I omega =I ((2pi)/(T))` = constant with increase of I, T will increase i.e., length of the day will increase. .
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