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Q. Certain stars at the end of their lives are thought to collapse combining their protons and electrons together to form a neutron star. Such a star could be thought of as a giant atomic nucleus. If a star of mass equal to that of the sun (M = 1.99 × 1030 kg) collapsed into neutrons (mn = 1.67 × 10-27 kg), what would be radius of such a star? (Hint: r = r0A1/3, where r0 = 1.20 × 10-15 m).

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