What is the average orbital speed of Earth around the Sun? (Note: r = 1.5 × 1011 m and P = 3.16 × 107 s.)
A. about 30 km/s
B. about 4.7 km/s
C. about 9.8 m/s2
D. 1,000 km/s
E. 365 days
Answer: A
Physics & Space Science
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