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A star of radius 1 × 10^6 km rotates about its axis with a period of 48 days. The star undergoes a supernova explosion, whereby its core collapses into a neutron star of radius 12 km. Estimate the period of the neutron star (assume the mass remains constant).
Answer in units of s
An incident ray strikes a mirror with an angle of 30 degrees to the surface of the mirror. What is the angle of the reflected ray
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