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Physics
Physics
Problem
Planets X and Y move in circular orbits around the same star. The orbital period of planet Y is twice the orbital period of planet X. The orbital radius of planet X is
R
R
R
. What is the orbital radius of planet Y? A.
2
3
R
\sqrt[3]{2}R
3
2
R
B.
4
3
R
\sqrt[3]{4}R
3
4
R
C.
2
R
2R
2
R
D.
4
R
4R
4
R
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