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December 21, 2014

Homework Help: physics

Posted by ajo on Sunday, October 21, 2007 at 4:51pm.

The earth moves around the sun in a nearly circular orbit of radius 1.50*10^11m. During the three summer months (an elapsed time of 7.89*10^6s), the earth moves one-fourth of the distance around the sun. (a)what is the average speed of the earth? (b) what is the magnitude of the average velocity of the earth during this period?

I can't get the right answer for this problem again.Please give me some hints to do it.Thanks a lot.

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