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If Earth contracts to half of its presen...

If Earth contracts to half of its present radius what would be the length of the day at equator?

Text Solution

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`I_(1)=(2)/(5)MR^(2) rArr I_(2)(2)/(5) M((R)/(2))^(2) rArr I_(2) (I_(1))/(4)`
`L=I_(1) omega_(i)= I_(2) omega_(2)`
or `I((2pi)/(T_(1)))=(1)/(4)((2pi)/(T_(2))) or T_(2) (T_(1))/(4)=(24)/(4)=6` hourse
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