The planet neptune was discovered in september 1846, Ask an Expert

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The planet Neptune was discovered in September 1846 following predictions derived from Newton's Law of Gravitation. Neptune describes an almost circular orbit around the Sun with a radius of 4.5x10^12 m.

Part A: What is the linear velocity v of Neptune on its orbit around the Sun?

Part B: How long will it take Neptune to circle the Sun once (the orbital period)?

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