Well, time is measured in seconds, but in this case, they want it in hours, right? The important time in this case is how long it will take for the Earth to go around the sun if their distance is 1.5x10^8.
Oh, ok.
Um...let's see...I know what the symbols stand for, it's just that I don't know if by r in this problem means the radius of the earth, and I don't even know what the time it takes.
I'm stuck on this math problem for my physics class, I'm sure it's not that difficult, but it confuses me:
The Average distance between the Earth and the sun is 1.50 X 10^8 km.
a. Calculate the average speed in km/h of Earth assuming a circular path about the sun. Use the equation v= 2TTr/T...