Subject: Physical Properties of Neutron Stars

I was curious as to the estimated density of nuetron star material at 
its surface vs at its core.  Also, what would the speed of sound in 
such a dense material.  Additionally,  due to its incredibly high rate 
of thermal conductivity wouldn't it be able to radiate it's thermal 
energy rapidly despite it's enormously high formation temperature and 
cool since insulative effects are not significant?

Re: Physical Properties of Neutron Stars