the tower of terror at disney world can lift 12 people 60 meters into the air if the engineers assume the the average person has a mass of how much rider weight does the ride lift into the air

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

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.

Which of the following can enter and exit a closed system? a. matter and energy b. neither energy nor matter c. matter but not energy d. enrgy but not matter