1.

The radius of orbit of a planet is two times that of Earth. The time period of planet is ...........years.

Answer»

4.2
2.8
5.6
8.4

Solution :`T_(2) =T_(1)((a_(2))/(a_(1)))^(3/2) rArrT_(2) = 1XX(2)^(3/2) = 2.8 `


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