1. The problem statement, all variables and given/known data 2. Relevant equations F=qE 3. The attempt at a solution So in solving the problem, parts a) and b) were rather easy, and I believed part c) would be easy as well. I assumed: F=10156*(1.6E-19) which came out to 1.63E-15, but that was apparently incorrect and I'm not sure what else to try. Any help is really appreciated.