Asatellite dish has the shape of a parabola when viewed from the side. the dish is 56 inches wide and 49 inches deep. how far is the receiver from the bottom of the dish if the receiver is placed at the focus?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)