Knowing the distribution of velocities, we can determine the collision frequency (as shown above). Knowing the previous two kinetic properties of a gas, we can now consider the Mean free path, the average distance a particle travels in between collisions. The question we are asking is:
In a unit of time, a particle travels a certain distance, along the way participating in a number of collisions. Thus, the mean
free path (the distance travelled between collision events) is:
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