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The orbital velocity of an artificial in...

The orbital velocity of an artificial in a circular orbit just above the earth's surface v. For a satellite orbiting at an altitude of half the earth's radius the orbital velocity is

A

`3/2 v_(0)`

B

`2/3 v_(0)`

C

`sqrt(2/3) v_(0)`

D

`sqrt(3/2) v_(0)`

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The correct Answer is:
C
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