Acircuit consists of a conducting movable bar and a lightbulb connected to two conducting rails as shown in the figure below. an external magnetic field is directed perpendicular to the plane of the circuit. which of the following actions will make the bulb light up? (select all that apply.)

the bar is moved to the left.
the bar is moved to the right.
the magnitude of the magnetic field is increased.
the magnitude of the magnetic field is decreased.
the bar is lifted off the rails.

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.