Q. A particle with a posistive charge of 3e moves with a velocity of 8000m/s in the x direction as it passes through an electic field E=.007 V/m that is in the z direction and simultaneously passes through a magnetic field B=.6 Tesla that is in the negative y direction. What is the magnetude of the force on the particle due to these fields and what is the direction of the force?

Q. Ann was reaching up to grab a box of cereal that was on top of the refrigerator. She had extended her arm as well as stood on her tip-toes to reach the box. Which primary muscle allowed Ann to extend her elbow and which two primary muscles allowed her to stand on her tip-toes? What were the antagonists to these muscles? For each muscle, determine the type of contraction.