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Average speed

  1. Apr 3, 2008 #1
    [SOLVED] average speed

    Calculate the average speed of a molecule that strikes a small surface. How does this compare with the average speed of all molecules?

    I started by using the root mean square speed as the average speed of some random molecule, for example hydrogen. So,

    v(rmss) = (3RT/M)^.5 = (3*8.314*298/2.016E-3) = 1920.120594 m/s.
    What I am confused about is how do I relate this with the average speed of all molecules. I would imagine that it would be a bigger value.

    Any help is appreciated.
  2. jcsd
  3. Apr 5, 2008 #2
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