Multiple Choice
The weight of spaceman Speff at the surface of planet X,solely due to its gravitational pull,is 389 N.If he moves to a distance of 1.86 × 104 km above the planet's surface,his weight changes to 24.31 N.What is the mass of planet X,if Speff's mass is 75.0 kg? 
A) 2.99 × 1024 kg
B) 2.99 × 1018 kg
C) 2.99 × 1017 kg
D) 1.59 × 1018 kg
Correct Answer:
Verified
Correct Answer:
Verified
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