B) A 5 kg mass is placed next to the end of the spring when it is compressed 0.60 m and the whole thing is let go. Neglecting the mass of the spring, how much potential energy has been lost by the mass when
it passes the point where the spring is compressed at 0.40 m?

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.