The french tgv train and japanese "bullet train" reach speeds of up to 180 mph with wheels moving on tracks about 1.5 m apart. at top speed moving perpendicular to the earth's magnetic field, what potential difference is induced across the tracks as the wheels roll?

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?