1. The problem statement, all variables and given/known data The drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. Surface 1 has an area of 1.2 m², while surface 2 has an area of 3.5 m². The electric field E in the drawing is uniform and has a magnitude of 246 N/C. Image: http://img513.imageshack.us/img513/9947/physicspf4.jpg [Broken] What's the electric flux through surface 1? What about surface 2? 2. Relevant equations [tex]\Phi = EAcos\Theta[/tex] 3. The attempt at a solution For #1, I attempted to do 246*1.2*cos(55°), which is incorrect at 169.3197 Nm²/C. What exactly am I screwing up here?