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Calculating the average speed of molecules in a gas

  1. Dec 12, 2009 #1
    1. The problem statement, all variables and given/known data

    Given that the integral [between infinity and 0] v3e-av2dv = 1/2a2

    calculate the average speed vav of molecules in the gas using the maxwell-boltzmann distribution function

    2. Relevant equations

    3. The attempt at a solution

    i dont really know what to do some guidance please =]
  2. jcsd
  3. Dec 12, 2009 #2


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    Homework Helper

    Let's say I have N particles in a box and I want to find out how many particles have speeds between v and v+dv. How do you use the Maxwell-Boltzmann distribution to do this? How do I find the sum of the speeds of every particle?

    Average speed is calculated by adding every particle's speed together and dividing the result by the number of particles.
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