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A planet of mass  moves around the sun of mass  in an elliptical orbit. The maximum and minimum distance of the planet from the sun are  and , respectively. The time period of the planet is proportional to

a)

b)

c)

d)


Question ID - 54739 :-

A planet of mass  moves around the sun of mass  in an elliptical orbit. The maximum and minimum distance of the planet from the sun are  and , respectively. The time period of the planet is proportional to

a)

b)

c)

d)

1 Answer
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Answer Key : (d) -

(d)

According to Kepler’s third law,   is proportional to cube of semi-major axis of the elliptical orbit.



Next Question :

The masses and radii of the earth and moon are  and  respectively. Their centres are distance  apart. The minimum velocity with which a particle of mass  shoule be projected from a point midway between their centres so that it escapes to infinity is

a)

b)

c)

d)


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