By throwing a ball at an angle 45 degrees a girl can throw the ball a maximum horizontal distance r on a level field how ar can se throw the same ball vertically upward assume that her muscles give the ball the same speed in each case. (is this assumption valid? )

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.