Converting Units: A Beginner's Guide

[lb beatz]

Homework Statement

Suppose that certain food was irradiated with an electron beam of kinetic energy 10 MeV. (a) What is the voltage needed for an 'electron gun' to give this kinetic energy to an electron from rest?

Relevant Equations

E = 10 MeV ---> transform to joule

E = e.U ---> ddp ( voltage)

How can I be doing this conversion, could someone explain to me?

 

[Delta2]

Welcome to Physics Forums

We can't provide the full solution for your homework, however we can provide you with hints towards the solution and warn you where you go wrong, provided that you write some attempt for the solution with a post of yours.

You don't have to transform the energy to joules to answer this.

Your second equation is quite relevant. Do you know how the unit of eV is defined? (don't give me a definition through the unit of Joule)