Question
A bare helium nucleus has two positive charges and a mass of $6.64 \times 10^{-27} \textrm{ kg}$ (a) Calculate its kinetic energy in joules at 2.00% of the speed of light. (b) What is this in electron volts? (c) What voltage would be needed to obtain this energy?
1. $1.20 \times 10^{-13} \textrm{ J}$
2. $7.57 \times 10^5 \textrm{ eV}$
3. $-3.74 \times 10^5 \textrm{ V}$
Solution Video