posted by Steve .
You have arranged that the magnetic field in a particular region of space is due North with a value of 0.009 T. An electron enters the field traveling to the west with a speed of 0.09 of the speed of light. As a result, the electron experiences a magnetic force, which is upward. What is the strength of this magnetic force, in fN? The "f" here stands for "femto", which is 10-15.