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Statistical mechanics, bernoulli's forumula - collision freqency

  1. Aug 25, 2014 #1
    I am having trouble understanding collision frequency in following discussion from Kubo,

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

    What am I missing ?
  2. jcsd
  3. Aug 25, 2014 #2


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    Staff: Mentor

    Between two collisions against the same wall, a molecule must travel a round-trip distance equal to twice the width of the container.
  4. Aug 25, 2014 #3
    ah. I was counting the opposite wall too. Thank You.

    ps. Should I close this thread now ?
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