Question

define mean free path
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Answer 1

Explanation:

Mean free path, average distance an object will move between collisions. ... The actual distance a particle, such as a molecule in a gas, will move before a collision, called free path, cannot generally be given because its calculation would require knowledge of the path of every particle in the region.

Answer 2

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Answer:

Definition:

Mean free path is the average distance an object will move between collisions. The actual distance a particle, such as a molecule in a gas, will move before a collision, called free path, cannot generally be given because its calculation would require knowledge of the path of every particle in the region.

Formulae:

The mean free path is the distance that a molecule travels between collisions. The mean free path is determined by the criterion that there is one molecule within the "collision tube" that is swept out by a molecular trajectory. The criterion is: λ (N/V) π r2 ≈ 1, where r is the radius of a molecule

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