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When a large star becomes a supernova, its core may be compressed so tightly that it becomes a neutron star, with a radius of about 11 km (about the size of a typical city). If a neutron star rotates once every 0.45 seconds,

(a) what is the speed of a particle (in km/s) on the star's equator and

(b) what is the magnitude of the particle's centripetal acceleration?

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