A neutron star has approximately the density of nuclear material.If a neutron star is the mass of the sun,1.99 1030 kg,what would be its radius? You may wish to use the relationship r = (1.2 fm) A1/3 together with the mass of a proton,1.67 10-27 kg,to estimate.
A) 12 km
B) 19 km
C) 13 km
D) 9.8 km
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