Q.

Kepler's law of planetary motion states that the square of the time period is proportional to the –

A. semi-major axis
B. square of the semi-major axis
C. cube of the semi-major axis
D. fourth power of the serni-major axis
Answer» C. cube of the semi-major axis
Explanation: Kepler's law of planetary motion states that the square of the time period is proportional to the cube of the semi-major axis.
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