What is the period (in hours) of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2
A) 1.75 h
B) 1.25 h
C) 1.15 h
D) 1.00 h
E) 1.45 h
Answer: A
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a. 
b. 
c. 
d. 
e. 
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