1. The problem statement, all variables and given/known data Consider three charges arranged as shown: Q1---------Q2----------Q3 Q1 has a value of 6.8 uC and is 3.5 cm away from O2 It is also a positive charge Q2 has a value of 1.2 uC and is 5cm away from O3 It is also positive Q3 has a value of -4.4 uC and is negative. What is the magnitude of the electric field strength at a point 1.1 cm to the left of the middle charge? The value of the Coulomb constant is K = 8.98755 x 10^9 N*m^2/C^2. Answer in units of N/C. 2. Relevant equations I think that I am going to have to use E = k*Q/r^2 (electric field) 3. The attempt at a solution Well using E = k*Q/r^2 this is what I did. I I did K*(6.8 x 10^-6)/(2.4 x ^-2) = 106103020.8 K*(1.2 x 10^-6)/(1.1 x 10^-2) = 89132727.27 K*(4.4 x 10^-6)/(6.1 x 10^-2) = 10627578.61 Final summation = 205863327.4 N/C I used the fact that the question was asking for the point charge to be 1.1cm away from the middle charge, so I used that distance to find the other distances in the upper equations. I think that this has to do with superpositioning. The thing is, I am not too sure that if that concept deals with this question. I basically used the electric field formula and applied it to each charge along the x axis. I tried to submit it into my online home and it was spit back out as wrong. Still trying to work on it.