The Earth orbits the Sun at an average speed of about

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

30 \text{ kms}^{-1}

. Neptune orbits the Sun with an orbital radius 30 times greater than the Earth's. The best estimate for the orbital speed of Neptune is (1)

1.0 \text{ kms}^{-1}

(2)

2.7 \text{ kms}^{-1}

(3)

5.4 \text{ kms}^{-1}

(4)

7.2 \text{ kms}^{-1}