A Neutron Star Has Approximately the Density of Nuclear Material $\times$

A neutron star has approximately the density of nuclear material.If a neutron star is the mass of the sun,1.99 $\times$ 10³⁰ kg,what would be its radius? You may wish to use the relationship r = (1.2 fm) A^1/3 together with the mass of a proton,1.67 $\times$ 10^-27 kg,to estimate.

A) 12 km
B) 19 km
C) 13 km
D) 9.8 km

Correct Answer:

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