1. The problem statement, all variables and given/known data Charge of a uniform density (8.0 nC/m2) is distributed over the entire xy plane. A charge of uniform density (5.0 nC/m2) is distributed over the parallel plane defined by z = 2.0 m. Determine the magnitude of the electric field for any point with z = 1.0 m. 2. Relevant equations E = F/q 3. The attempt at a solution Calculate the electric field at z = 1 due to the first plane, and then calculate the electric field at z = 1 due to the second plane. And then subtract the two? I however don't know how to get the force, since the charge is given over a metre^2, what do I do?