- #1

erinec

- 31

- 0

## Homework Statement

A proton is fired from far away towards a Hg nuclide.

Determine the distance of closest approach of the proton to the

centre of the nuclide when the initial speed of the proton is

4.0 * 10

^{7}m/s.

(Answer: 13.8 fm)

## Homework Equations

(1/2)mv

^{2}= kqq/r

## The Attempt at a Solution

I plug the numbers straight in and solve for r to get 3.113 * 10^-15, which is totally different from the correct answer above. (For mercury charge, I used 80e since mercury has 80 protons.)