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Neutron stars are extremely dense objects that are formed from the remnants of supernova explosions. Many rotate very rapidly. Suppose that the mass of a certain spherical neutron star is 1.9 times the mass of the Sun and its radius is 20.9 km. Determine the greatest possible angular speed it can have so that the matter at the surface of the star on its equator is just held in orbit by the gravitational force. Give your answer in revolutions per second. DATA: Msun=1.992×1030 kg 

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