1. The problem statement, all variables and given/known data The electric field strength 7.79 cm from a very long charged wire is 2660 N/C. What is the electric field strength (in N/C) 12.7 cm from the wire? 2. Relevant equations E= (9*10^9) Q/ r^2 3. The attempt at a solution i have energy. so is tried to solve backwards for the first one for Q. Then i plugged in the new Q with relation to 0.127 m. I got 1001 N/C which is wrong. Am I even using the right formula?