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Homework Help: Algebraic expressions for the amount of time that elapses

  1. Sep 26, 2016 #1
    1. The problem statement, all variables and given/known data
    A single gas molecule of inertia m is trapped in a box and travels back and forth with constant speed v between opposite walls A and B a distance l apart. At each collision with a wall, the molecule reverses direction without changing speed.Write algebraic expressions for the amount of time that elapses between collisions with wall B.

    2. Relevant equations

    3. The attempt at a solution
    i know that the equation does not depend on mv, and must involve l and v. I believe that the equation should be something along the lines of 2lv. can anyone work through this to make sure it is correct with me
  2. jcsd
  3. Sep 26, 2016 #2


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    Homework Helper

    v is given in distance/time, so an expression for time would require distance divided by v to get units in time.
  4. Sep 26, 2016 #3
    thank you i already solve the question on my own though
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