if the ice on the polar cap of the earth melts,how will it affect the duration of the day?

Hi dear,

If the ice caps at Antartica and Greenland were to melt, then days would get slightly longer and slightly fewer of them in a year. The water gets distributed all over the globe rather than being near the poles, therby increasing earth's moment of inertia. Hence earth angular velocity changes while having the same angular momentum.

But, this is a very small change to experience as mass of water is very very little compared to the mass of the massive earth.

Hope this helped.

Regards

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