Given the mass of iron nucleus as 55.85 u and A = 56, find the nuclear density ?

Explanation

`m_(Fe) = 55.85 , " " u = 9.27 xx 10^(-26) kg`
Nuclear density = `("mass")/("volume") = (9.27 xx 10^(-26))/((4 pi//3)(1.2 xx 10^(-15))^(3) xx 1/56`
`= 2.29 xx 10^(17) kg m^(-3)`
The density of matter in neutron stars (an astrophysical object) is comparable to this density. This shows that matter in these objects has been compressed to such an extent that they resemble a big nucleus.