The earth and moon are seperated by a center-to-center distance of 3.85x10^8m. The mass of the earth is 5.98x10^24kg and that of the moon is 7.35x10^22kg. How far does the center of mass lie from the center of the earth?(adsbygoogle = window.adsbygoogle || []).push({});

I know you have to use the equation

Xcm=m1x1+m2x2/m1+m2

I don't know what x1 or x2 and i am not exactly sure what you measure x1 and x2 from and that is probably why i can't figure out how to use the equation.

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# Homework Help: How far does the center of mass lie from the center of the earth?

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