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Astronomers have observed a small, massive object at the center of our Milky Way Galaxy. A...

  1. Astronomers have observed a small, massive object at the center of our Milky Way Galaxy. A ring of material orbits this massive object; the ring has a diameter of about 12 light-years. If this massive object at the center has a mass of 2.75 x 1037 kg, what is the material orbital speed? Give your answer in km/h.
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