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## Main Question or Discussion Point

When do we use the Boltzmann equation for density in a Fermi plasma?

n in [cm

and when do we use the ρ=m/V, ρ in [Kg/m

(this is not an example, I just added the equations to make my question more understandable)

Is the ideal gas only when we have electron and ions? Is the Boltzmann equation applicable when we change the electrons to other particles like ions, protons or muons?

n in [cm

^{-3}]and when do we use the ρ=m/V, ρ in [Kg/m

^{3}](this is not an example, I just added the equations to make my question more understandable)

Is the ideal gas only when we have electron and ions? Is the Boltzmann equation applicable when we change the electrons to other particles like ions, protons or muons?