The magnitude of earth's magnetic field is about 0.5 g near earth's surface. part a what's the maximum possible magnetic force on an electron with kinetic energy of 1 kev ? express your answer using two significant figures. f m f m = nothing n submitrequest answer part b compare with the gravitational force on the electron. express your answer using two significant figures. g

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?