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A satellite of mass m revolves around th...

A satellite of mass m revolves around the earth of radius R at a hight x from its surface. If g is the acceleration due to gravity on the surface of the earth, the orbital speed of the satellite is

A

gx

B

`frac(gR)(R-X)`

C

`frac(gR^2)(R+x)`

D

`(frac(gR^2)(R+x)^1/2)`

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