1. The problem statement, all variables and given/known data A vertical electric field of magnitude 2 X 10^4 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. A car with a rectangular size of 3.00 m by 1.50 m is traveling along a dry gravel roadway sloping downward at 7.0°. Determine the electric flux through the bottom of the car. 2. Relevant equations Eflux = E*(A cos theta) 3. The attempt at a solution (2*10^4)*(3*1.5)*(cos 7) = 89,329 Nm^2/C = 8.93*10^4 Nm^2/C Is this correct? It seems pretty straightforward to me, but I can't help think that there is some trick in the question that I'm not seeing. Flux through a surface perpendicular to the electric field obviously has cos 90 = 0 as the angle angle associated with it so it would just be Eflux = E*A, but there is an angle here, so it would simply be cos 7. Does the thunderstorm brewing have any bearing on the equations affecting the answer?