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February 1, 2015

February 1, 2015

Posted by **Jeremiah** on Saturday, May 18, 2013 at 5:09pm.

How long does it take for planet Z to complete an orbit?

- Physics -
**bobpursley**, Saturday, May 18, 2013 at 6:43pmkepplers third law: the square of the orbital period is proportional to the cube of mean radius.

4^2/T^2=5^3/12^3

solve for period T

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