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Homework Help: De – Broglie wavelength of O_2

  1. Dec 26, 2017 #1
    1. The problem statement, all variables and given/known data
    upload_2017-12-26_17-54-23.png

    2. Relevant equations


    3. The attempt at a solution


    De – Broglie wavelength of ## O_2 ## molecule is ## \lambda = \frac h p ##

    Assuming that the speed of molecule is small enough to take non – relativistic calculation,

    ## \frac { p^2}{2m} = \frac { 3 k_B T }2 ##

    ## \lambda = 2.6 * 10^{-11}~ m ##

    So, the correct option is (a).
     
  2. jcsd
  3. Dec 26, 2017 #2

    kuruman

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    Looks right.
     
  4. Dec 26, 2017 #3
    Thanks.
     
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