Consider a spherical gaussian surface of radius r centered at the origin. a charge q is placed. inside the sphere. where should the charge be located to maximize the magnitude of the flux of the electric field through the gaussian surface?

The path of a satellite orbiting the earth causes it to pass directly over two tracking stations a and b, which are 51 miles apart. when the satellite is on one side of the two stations, the angles of elevation at a and b are measured to be 87 degrees and 84 degrees, respectively. (a) how far is the satellite from station a? (b) how high is the satellite above the ground?