A is a device that uses a smaller current to control a larger current. fuse rheostat relay switch circuit breaker

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples