Trina makes a diagram to summarize how to use the right-hand rule to determine the direction of the magnetic force on each type of charge. which labels belong in the regions marked x, y, and z? a) x: thumb, for velocity y: fingers, for magnetic field z: palm of hand, for force b) x: back of hand, for force y: thumb, for velocity z: palm of hand, for force c)x: palm of hand, for force y: thumb, for velocity z: fingers, for magnetic field d) x: palm of hand, for force y: fingers, for magnetic field z: back of hand, for force

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)