shows a cube whose sides are 5 cm long. Over the entire left-hand side of the cube is a uniform electric field E1 = 8900 N/C which is entering the cube at an angle θ1 = 15∘ shown. Over the right-hand side is a uniform electric field E2 = 4700 N/C which is leaving the cube at an angle θ2 = 60∘. Everywhere else, the electric field is zero.