Which of the following is an example of kinetic energy? a) a boy resting on a park bench b) a book sitting on a shelf c) a rubber band stretched as far as it can go d) a swing moving back and forth

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.