A charge is passing through a static magnetic field. The velocity of the charge makes a 90o angle with the field. The force exerted by the magnetic field does work on the charge. Group of answer choicesTrueFlase

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

In a system, when potential energy decreases, then entropy also decreases. true false

Why does lightning travel from clouds to the ground?