Solve the following questions:
Question I: What is the magnitude of the orbital velocity, in m/s, of the earth around the sun? The orbit radius of the earth is 1.50×1011m.
Question II: What is the magnitude of the orbital velocity, in m/s, of Mercury around the sun? The orbit radius of the Mercury is 5.79×1010m, the orbit period of Mercury is 88.0 d.
So confused, please explain how you got the answers. Thanks.