1. The problem statement, all variables and given/known data An equilateral triangle is formed with 3 rods, each with a length of 10cm. Two of them carry a charge of +63nC and 1 carries a charge of -63nC. The charge is uniformly distributed along each rod. What is the magnitude of the electric field at the center of the triangle? 2. Relevant equations E_Rod = KQ / (d*sqrt(d^2 * (L/2)^2)) 3. The attempt at a solution Center of triangle is 4.33cm, or .0433m from each rod. Constant K = 9.0*10^9 Q: Charge d: Distance L: Length of rod E_Rod = KQ / (d*sqrt(d^2 * (L/2)^2)) E_Rod = (9.0*10^9)Q / (.0433sqrt(.0433^2 + .05^2)) Plugging in 63*10^9, 63*10^9, and -63*10^9, I receive: E_Rod(1,2,3) = 197976,197976,-197976 Adding the three gives me a net E_rod = 197976, which is wrong.