Electric charges produce electric fields. When electric charges flow,
electric current is produced and this produces magnetic fields.
Electromagnetic waves are produced when
A) electric and magnetic fields interact.
B) electric current stops flowing and the magnetism takes over.
C) the magnetism disappears and the electric current takes over.
D)electrical forces and magnetic forces create fields that cancel each
other out

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

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a. m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation