QCAA Physics Practice Questions - QCAA Senior Secondary Physics (Queensland Units 3 & 4) Exam

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Kepler's third law of planetary motion states that the square of a planet's orbital period T is proportional to which quantity?

The square of its mean orbital radius (r²) The cube of its mean orbital radius (r³) The mean orbital radius (r) The inverse of its orbital radius (1/r)

Correct Answer:

The cube of its mean orbital radius (r³)

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