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The mass of the Moon is 7.4x1022 kg, and its diameter is 3474 km. During the...

The mass of the Moon is 7.4x1022 kg, and its diameter is 3474 km.

During the Apollo landings, once reaching the Moon two astronauts would get into the Lunar Module from the Command Module. The LM would then separate from the CM and descend to the surface. What is the speed of the LM, in a circular orbit around the Moon at an altitude of 277km

What is the period of that orbit? ​

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