A satellite is in circular orbit at an altitude of 1500 km above the surface of a nonrotating planet with an orbital speed of 9.2 km/s. The minimum speed needed to escape from the surface of the planet is 14.9 km/s, and G = 6.67 10^-11 N◆ m^2/kg^2. The orbital period of the satellite is closest to the answer is 72 min.
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