Question:

A neutron star whose mass is 1.5 solar masses has a radius of about 11 km. Calculate its average density and compare to that for a white dwarf (Problem 9) and to that of nuclear matter.

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer:

$\rho_n = 5.4 \times 10^{17} \textrm{ kg/m}^3$, $\dfrac{\rho_n}{\rho_w} = 2.9 \times 10^8$, $\dfrac{\rho_n}{\rho_{\textrm{nuclear matter}}} = 1.3$