The weight of spaceman Speff,solely due to the gravitational pull of planet X at its surface,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 kg?
A) 2.96 × 1024 kg
B) 2.96 × 1018 kg
C) 2.96 × 1017 kg
D) 1.59 × 1018 kg
Correct Answer:
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