Assume that the mass of a nucleus is approximately given by M = Amp where A is the mass number. Estimate the density of matter in kg m–3 inside a nucleus. What is the specific gravity of nuclear matter?
Given mass of nucleus(M) = Amp
We know that,
(mass of proton)
where μ is the atomic mass unit ,
Radius of nucleus(R) 
Volume(V)
Density(D) 
= 3.0000688 × 1017 kg/m3
Specific gravity 
= 3.0000688 × 1014.
Hence, the density of matter in kg m–3 inside a nucleus is 3.0000688 × 1017 kg/m3 and its specific gravity is 3.0000688 × 1014.
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