Determine the mass of the Moon from the known acceleration of gravity on the Moon (g = 1.6 m / s2; the radius of the Moon is 1737 km).

g = G * M / R ^ 2; M = g * R ^ 2 / G = 1.6 m / s ^ 2 * (1.737 * 10 ^ 6 m) ^ 2 / 6.67 * 10-11 Nm2 / kg2 = 7.3510 ^ 22 kg.

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