1. The problem statement, all variables and given/known data A 10 nC point charge is at the center of a 2 m x 2 m x 2 m cube. What is the electric flux through the top surface of the cube? 2. Relevant equations Electric Flux = E x A x cosθ Electric Flux = ∫E x dA = Q(inside)/ε E (point charge) = kq/r^2 where k = 1/(4pi ε) 3. The attempt at a solution Aside from finding the area, volume, and anything else that might be considered obvious, I've no idea where to head from here. I'm not sure if the cube is completely closed or if the top surface isn't uniform. I'm hoping someone can help walk me through this problem.