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Question

A neutron star has a density equal to that of the nuclear matter. Assuming the star to be spherical, find the radius of a neutron star whose mass is 4.0 ×1030 kg (twice the mass of the sun).


Solution

We know f=MV

V=Mf=4×10302.4×1017

=10.6×1013

=16×1014

V=43πR3

16×1014=43×π×R3

R3=16×34×1π×1014

R3=18×100π×1012

R=12×104×3.17

=1.585×104=15km

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