# Electric potential

1. Sep 28, 2007

### latour1973

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......

2. Sep 28, 2007

### genneth

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?