Recent content by Freezeline

You found my mistake. I was using 1.6x10-19joules equals 1 eV, instead of 1.602x10-19. Thank you for your help.

When I use E=mc2 to calc. the rest energy of an electron, I get .512Mev not .511Mev. I am using 9.109x10-31 kg for the rest mass of an electron and 2.9979x10^8 m/s for the speed of light in a vacuum. Can anyone tell me why there ís a discrepancy between my results and the accepted answer?