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Kinetic theory is part of statistical physics. DO NOT USE this tag for macroscopic kinematics; use the [kinematics] tag instead.

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Average velocity component of particle in isotropic distribution

I am looking for $\langle |v_i|\rangle$ in terms of $\langle v\rangle$, where $i = x, y, z$ in an isotropic distribution of particles. Since the distribution is isotropic or, equivalently, sphericall …
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