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B I don't understand how this was manipulated

  1. Jun 13, 2016 #1
    I'm reading an explanation that involves the atom hitting the wall twice so the distance the atom traveled is 2d along the x direction in time delta t. Then the paragraph concludes that delta t = 2d/vx
    So I assumed that it was because vx = 2d/delta t. Is that it? Or is there something that I'm missing? Thanks!
  2. jcsd
  3. Jun 13, 2016 #2

    That's all there is to it.
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