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Conversion constant from mass to energy

  1. Sep 26, 2012 #1
    I was told at school that if we want to calculate the rest energy of the proton, we multiply its rest mass = 938 MeVc^-2 by a factor of 1.6*10^-13. However, doesn't this convert MeV to Joules only? What about the c^2? Please explain why we can omit it in our calculations. Thank you!
     
  2. jcsd
  3. Sep 26, 2012 #2

    mathman

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    c2 is built into the constant you use.
     
  4. Sep 26, 2012 #3
    The rest energy is 938Mev
     
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