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Grade: 12

                        

The moon revolves round the earth 13 times in one year. if the ratio of the sun-earth distance to the earth-moon distance is 392, then the atio of the masses of sn and earthwill be............

2 years ago

Answers : (1)

Arun
24742 Points
							
Dear student
T²(es) = 4 (pi)² R³(es)/G M(s)
T²(me) = 4 (pi)² R³(me)/G M(e)
[T(me)/T(es)]² = R³(me) M(s)/ R³(es) M(e)
(1/13)² = (1/392)³ M(s)/M(e)
M(s)/M(e) = 392³/13²
Regards
Arun (askIITians forum expert)
2 years ago
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