Aproton moves in an electric field from point x to point y. if the potential difference
between the two points is 400 v, what is the speed of the proton when it passes through point y? the
speed of the proton at point x is 4.5 x 10^5 m/s. (charge on a proton = 1.6 x 10^-19 c mass of proton
= 1.67 x 10^-27kg)