Statistical mechanics, bernoulli's forumula - collision freqency

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The discussion centers on the concept of collision frequency in statistical mechanics, specifically referencing Kubo's formula. The formula indicates that collision frequency is derived from the ratio of momentum to the product of mass and distance. A clarification is made regarding the round-trip distance a molecule travels between collisions, emphasizing that it should account for the distance to only one wall. The participant realizes their mistake in counting the distance to both walls. The thread concludes with a question about whether to close the discussion.
AirTycoon
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Hello,
I am having trouble understanding collision frequency in following discussion from Kubo,
EtOMYXp.png


$$collision\ frequency = \frac{1}{\frac{l}{v_{x}}}=\frac{p_{x}}{ml}$$

What am I missing ?
 
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Between two collisions against the same wall, a molecule must travel a round-trip distance equal to twice the width of the container.
 
ah. I was counting the opposite wall too. Thank You.

ps. Should I close this thread now ?
 

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