Final answer:
To calculate the electric flux through a non-perpendicular surface in a uniform electric field, use the formula Φ = E · A · cos(θ), where E is the field's magnitude, A is the surface area, and θ is the angle between the field and the normal to the surface.
Step-by-step explanation:
The student is asking about calculating the electric flux through a surface sitting in a uniform electric field when the surface is not perpendicular to the field. To calculate the electric flux, which is a measure of the number of electric field lines passing through a given area, we use the formula Φ = E · A · cos(θ), where Φ is the electric flux, E is the magnitude of the electric field, A is the area of the surface, and 0 is the angle between the field and the normal to the surface. Given the uniform electric field of 436.8 N/C and the planar surface area of 0.053 m2, along with the angle from the provided figure or context (which needs to be specified by the student), we can calculate the electric flux. Remember, if the angle is not provided, it's assumed that the field is perpendicular to the surface (0° angle), and the formula simplifies to Φ = E · A.