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.
what power setting caused the breaker to trip? a) 600 wb) 900 wc) 1200 wd) 1500 w

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.