Quantum Mechanics uncertianty in momentum

[senan]

Homework Statement

A neutron star has a core composed of protons and neutrons (nucleons) and has a density
higher than the nuclear saturation density ns = 0.16 fm ^−3
.
(i) [6 points] Assuming nuclear saturation density throughout the core, calculate the
uncertainty in momentum for a nucleon in the core.

Homework Equations

The Attempt at a Solution

(i) I have no idea how to go about this at all none of the equations I know deal with a density

 

[Fightfish]

From the density of the core, you can work out how much space each nucleon occupies and hence the uncertainty in the position of a nucleon.