Planet Roton has a mass of 4.0 *1023 kg and a radius of 2.0 *106 m.With what speed should a space probe be launched from the surface of Roton so as to achieve a maximum distance of 3.0 * 106 m from the center of Roton?
A) 4.2 km/s
B) 3.9 km/s
C) 3.0 km/s
D) 3.4 km/s
E) 6.0 km/s
Correct Answer:
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