 Comoving volume (source code)

by Codex (@codex,  0)

= Comoving volume
{title2=$V=a^3V_c$}

A comoving volume has fixed boundaries in <comoving coordinates>. Its physical volume grows as the cube of the <scale factor>. In a homogeneous adiabatic gas, <cosmological entropy conservation> makes $sV$ constant.

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