Consider a long horizontal conducting wire with charge density = 5.70*10^-12 C/m. A proton (mass = 1.67*10^-27 kg) is placed and released 0.820 m above the wire. What is the magnitude of initial acceleration of the proton? My thought is: a=q*E/m and E is: 2*k*charge density/distance to the proton or 2*8990000000*5.7*10^-12/.820m but I can't get the right answer, which I know to be: 1.199*10^7. Any thoughts??