AP Physics 1mediummcq1 pt
A planet's orbital radius is 4 times another's. By Kepler's third law, its period is
A.8 times longer
B.4 times longer
C.2 times longer
D.16 times longer
Explanation
Core Concept
T² ∝ r³, so T ∝ r^(3/2) = 4^(3/2) = 8.
Correct Answer
A8 times longer
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