- #1
Leonardo Machado
- 57
- 2
Hi everyone!
I'm currently strudying some astrophysical equation of states, some stuff about Fermi's gas and I'm kinda confused about the relation between the energy density and the mass density,
$$
\frac{\epsilon}{c^2}=\rho.
$$
I don't get why they do not use whole
$$
\epsilon=\frac{E}{V}=\frac{\sqrt{p^2c^2+m^2c^4}}{V}
$$
could someoen explain me this ?
Thanks!
I'm currently strudying some astrophysical equation of states, some stuff about Fermi's gas and I'm kinda confused about the relation between the energy density and the mass density,
$$
\frac{\epsilon}{c^2}=\rho.
$$
I don't get why they do not use whole
$$
\epsilon=\frac{E}{V}=\frac{\sqrt{p^2c^2+m^2c^4}}{V}
$$
could someoen explain me this ?
Thanks!