Derive a formula for the bullet speedvin terms ofd, t, and a measured angleθbetween the position of the hole in the first disk and that of the hole in the second. if required, useπ, not its numeric equivalent. both of the holes lie at the same radial distance from the shaft.θmeasures the angular displacement between the two holes; for instance,θ=0means that the holes are in a line andθ=πmeans that when one hole is up, the other is down. assume that the bullet must travel through the set of disks within a single revolution.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?