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Momentum of electron

  1. Dec 27, 2008 #1
    find the speed of an electron.
    given that the momentum of the electron is 4.8 x 10-19kg.m/s

    p=mv/ sqr root of 1-(v/c)2



    use the above equation to find v.
    The solution in the textbook re-writes the above equation as
    p=(mc)(v/c)/sqr root 1-(v/c)2. How on earth do they come to this, and how is this equation solved. been sitting with this for a long time and very confused.
     
  2. jcsd
  3. Dec 27, 2008 #2
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