Atrain is moving parallel and adjacent to a highway with a constant speed of 27 m/s. a car is traveling in the same direction as the train at 56 m/s. the car’s horn sounds at 580 hz and the train’s whistle sounds at 360 hz. when the car is behind the train what frequency does an occupant of the car observe for the train whistle? the speed of sound is 343 m/s. answer in units of hz.(a) when the car is behind the train, what frequency does an occupant of the car observe for the train whistle. after the car passes and is in front of the train, what frequency does the train passenger observe for the car horn?

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?