A planet orbits a star in a year of length 249 x 107 s in a, Ask an Expert

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A planet orbits a star, in a year of length 2.49 x 107 s, in a nearly circular orbit of radius 2.39 x 1011 m. With respect to the star, determine

a) the angular speed of the planet,

b) the tangential speed of the planet, and

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