1.

The mean distance from Saturn to the sun is 9 times greater than the mean distance from Earth to the sun. how long is a saturn year?

Answer»

18 Earth years
27 EARTHS years
81 earth years
243 earth years

Solution :Kepler's Third Law SAYS that `T^(2) propR^(3)` for a planet with a circular orbit of radius R. since `T prop R^((3)/(2))`, if R increases by a factor of 9, then T increases by a factor of `9^((3)/(2))=(3^(2))^((3)/(2))=3^(3)=27`.


Discussion

No Comment Found

Related InterviewSolutions