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Suppose the gravitational force varies inversely as the

 

Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius R around the sun will be proportional to

(a)        R(n+1/2)                                     (b) R(n-1/2)

(c)   Rn                                                    (d) R(n-2/2)

Answer: n

(8)

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