Question

find the time period of the earth when the mean distance from the sun is decreased to half?

Answer 1

kepler's third law of planetary motion. T^2 is proportinal to R^3.

Answer 2

@Ujjwal . I need to thank you for this. This was one formula I could never remember (I suck at mugging up stuff). But since I had to help you, I had looked it up yesterday, and so I could remember it today. And in an exam today there was a question similar to what you posted above. So you could guess what happened! Thanks! :)

Answer 3

WC.. :)