1. A 9.4×1021 kg moon orbits a distant planet in a circular orbit of radius 1.5×108 m. It experiences a 1.1×1019 N gravitational pull from the planet. What is the moon’s orbital period in earth days?

The orbital period of the moon in Earth days is 26 days.

The given parameters;

The centripetal force experienced by the planet is given as;

The orbital period of the moon in Earth days is calculated as follows;

Thus, the orbital period of the moon in Earth days is 26 days.

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a straight line sloped

e/c, where e is its total energy