An electron traveling from the sun as part of the solar wind strikes the earth's magnetosphere at latitude 800Ⓡ Nin a region where the magnetic field has a strength of 15.0 AT and is directed toward the earth's center. The electron has a speed of 400 km/s and is directed toward the earth's axis parallel to the equator Magnetic forces send the election on a helical trajectory

Part A What is the radius of this helix?
Part B With what speed does the electron approach the surface of the earth?
Part C If you are looking downward toward the earth from space, is the electron's motion clockwise or counterclockwise?

a. The electron's motion is counterclockwise
b. The electron's motion is clockwise