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If radius of earth is increased, without...

If radius of earth is increased, without chage in its mass, will the length of day increase, decrease or remain same?

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`I` will increase (as `I=(2)/(5)mR^(2)`)
`thereforeomega` will decrease (as `Iomega=` constant)
`thereforeT` will increase (as `T=2pi//omega)`
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