If the ice on the polar caps of the earth melts and water collected about equator, how will that affect the duration of a day?

If the ice on the polar caps of the earth melts and water collected ab

1.	If the ice on the polar caps of the earth melts and water collected about equator, how will that affect the duration of a day?
Answer» Day becomes short Length of day cannot change Day becomes long Length of day and night becomes same Solution :When the ice on polar caps of earth MELTS and water collected about equator, then the moment of inertia increased `(r_("polar")ltr_("equator"))` Since external torque on earth is not acting, its angular momentum remains constant `therefore omega_(1)I_(1)=omega_(2)I_(2),I_(2)ltI_(2)` `{:(omega_(1)gtomega_(2),\|,"PERIODIC time for one"),(therefore (2pi)/(T_(1))GT(2pi)/(T_(2)),"revolution increases and",),(therefore T_(2)gtT_(1),"hence length of day increase",):}`