1.

The radius of the earth is reduced by `1%` with mass remaining the same. The escape velocity form the earthA. increases by `0.5%`B. decreases by `11%`C. remains the sameD. decreases by `0.5%`

Answer» Correct Answer - a
`(Deltav_(e))/(v_(e))=-(1)/(2)(DeltaR)/(R)`
`=-(1)/(2)xx1%=-0.5" increases"`
`(Deltav_(e))/(v_(e))=-0.5%" increase."`


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