An evacuated tube uses an accelerating voltage of 40 kV to accelerate electrons to hit a copper plate and produce X-rays. Nonrelativistically, what would be the maximum speed of these electrons? Mass of an electron = 9.11×10-31 kg Negative Charge of an electron = 1.6×10-19 C 2.00×10^8 m/s 2.28×10^8 m/s 3.38×10^8 m/s 1.19×10^8 m/s