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Homework Help: Alpha Particle speed problem

  1. Jul 14, 2010 #1
    1. The problem statement, all variables and given/known data

    An Alpha Particle is emitted with a kinetic energy of 2.34 MeV during a radioactive decay process. The maximum speed of the alpha particle is?

    2. Relevant equations

    KE=mv2
    1 ev = 1.6x10-19j

    3. The attempt at a solution
    [tex]\sqrt{(2.34x10^6)(1.6x10^-19)/4(1.6x10^-27)}[/tex]

    Unfortunately the manual uses this solution for the problem:

    [tex]\sqrt{2(2.34x10^6)(1.6x10^-19)/4(1.6x10^-27)}[/tex]

    Could anyone explain to me where the 2 comes from?
     
  2. jcsd
  3. Jul 14, 2010 #2
    Nevermind... I see what I did wrong..

    KE= 1/2 mv^2 DUHHHH
     
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