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Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon.

Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the
Moon. Assume the orbit to be circular and 100 km above the surface of the Moon, where the
acceleration due to gravity is 1.52 m/s
2
. The radius of the Moon is 1.70 × 10
6
m. Determine (a)
the astronaut's orbital speed, and (b) the
period of the orbit.

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