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if he daimeter of earth reduces and become half then what would be the duaration of earth of day

if he daimeter of earth reduces and become half then what would be the duaration of earth of day
 

Grade:11

1 Answers

Arun
25750 Points
6 years ago
The moment of inertia (If I = 2/5 MR2R2) of the earth about its own axis will become one-fourth and so its angular velocity will become four times (L = Iω= constant). Hence, the time period will reduce to one-fourth (T = 2ππ/ω to), i.e. 6 hours

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