If an electron strikes a screen after being accelerated from rest through a potential difference of 6500 V, find its speed (ignoring the effects of special relativity) just before it strikes the screen. 1.5 x 1018 m/s 1.4 x 1017 m/s 2.3 x 10^15 m/s 1.2 x 10^17 m/s 4.8 x 1017 m/s