1. The problem statement, all variables and given/known data The figure shows a closed Gaussian surface in the shape of a cube of edge length 1.80 m. It lies in a region where the electric field is given by E= (2.86x + 3.82)i + 7.18j + 8.36k N/C, with x in meters. What is the net charge contained by the cube? 2. Relevant equations ε0 × ΣΦ = Σqenc Φ = ∫E⋅dA 3. The attempt at a solution I'm not even sure if the above equations are the correct ones to use, actually. I've never seen a problem like this and I'm not sure how to even begin. I know, however, that the y- and z-components of the electric field on this cube are constant. That is as far as I am, unfortunately. Thanks so much for your help.