- #1

kraigandrews

- 108

- 0

## Homework Statement

If the radius of the gold nucleus is 6.47 fm, and the radius of the α particle is 2.36 fm, then what is the minimum required kinetic energy for the α particle if we want the two nuclear surfaces to touch in a head-on collision?

## Homework Equations

U

_{e}=(kq

^{1}q

^{2})/r

## The Attempt at a Solution

so using U

_{e}=KE

q

_{1}=2

q

_{2}=79

then it should be straightforward plug and chug, however the KE this yields is very high, around 3E45 eV this cannot be right, what am I doing wrong?