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A 2.8  104 kg spacecraft orbits a planet of mass 1.2  1025 kg. The...

A 2.8  104 kg spacecraft orbits a planet of mass 1.2  1025 kg. The craft's orbital radius is 3.6  108 m.

A) Find the orbital speed of the craft.

B) How much energy must the craft gain if it moves to a new orbit of radius 7.2  108 m?

C) What will be the period of the new orbit?

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