posted by Bill .
Calculate the force on an electron (qe = -1.6 x 10-19 C) in each of the following situations:
a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field
b.) 3.0 x 10-6 m from a proton
c.) in Earth's gravitational field at the surface of Earth
oops accidentally posted twice... sorry.