# Cumulative problem

1. Jan 28, 2008

### plstevens

Neutron stars are believed to be composed of solid nuclear matter, primarily neutrons.

A. Assume the radius of a neutron to be approximately 1.0*10^-13cm , and calculate the density of a neutron. [Hint: For a sphere V=(4/3)(pie symbol)r^3.]

d=__________g/cm^3

B. Assuming that a neutron star has the same density as a neutron, calculate the mass (in kg) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.18 mm.

m=_____kg

Last edited: Jan 28, 2008
2. Jan 29, 2008

### chemisttree

Well, where do you think we should start?