Electric Potential: Alpha Particle Speed Calculation

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latour1973
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An alpha particle (q=+2e, m=6.64*10^-27 Kg) is emitted in a radioactive decay with KE=5.53MeV what is its speed?

can someone help me to slove this problem...
 

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The rules of the forum say that you have to display some working, so that we know where to begin.

In this case, the obvious question is: is it relativistic?
 

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