EXPRESS THE SOLUTION VIA THE GRESA METHOD Direction: Respond to the following word puzzles. Demonstrate your comprehensive solution and response. 1. The siren of a police car emits a sinusoidal wave at a frequency of 300 Hz. The sound speed is 340 meters per second and the air is motionless. a.) What frequency does a listener hear if they are at rest and the siren is travelling away at 30 m/s? b.) What frequency does the listener hear if the siren is at rest and the listener is traveling away from it at 30 m/s? The siren is traveling away from the listener at a relative speed of 45 m/s, while the listener is traveling toward the siren at a relative speed of 15 m/s. What frequency does the listener hear if the siren emits a 1kHz sound? What frequency is heard by a person traveling at 15 m/s near an 800 Hz factory whistle? Assume the speed of sound is 340 meters per second. A truck and an ambulance are traveling at the same rate of 13 m/s in the same direction but on separate lanes. If the ambulance siren generates a sound with a frequency of 1200 Hz, what frequency does the truck driver hear? The poli
EXPRESS THE SOLUTION VIA THE GRESA METHOD Direction: Respond to the following word puzzles. Demonstrate your comprehensive solution and response. 1. The siren of a police car emits a sinusoidal wave at a frequency of 300 Hz. The sound speed is 340 meters per second and the air is motionless. a.) What frequency does a listener hear if they are at rest and the siren is travelling away at 30 m/s? b.) What frequency does the listener hear if the siren is at rest and the listener is traveling away from it at 30 m/s? The siren is traveling away from the listener at a relative speed of 45 m/s, while the listener is traveling toward the siren at a relative speed of 15 m/s. What frequency does the listener hear if the siren emits a 1kHz sound? What frequency is heard by a person traveling at 15 m/s near an 800 Hz factory whistle? Assume the speed of sound is 340 meters per second. A truck and an ambulance are traveling at the same rate of 13 m/s in the same direction but on separate lanes. If the ambulance siren generates a sound with a frequency of 1200 Hz, what frequency does the truck driver hear? The police car is traveling at a rate of 30 meters per second toward a warehouse. What frequency does the driver hear reflected off the warehouse if the police car emits a 1kHz sound? Assume the speed of sound is 340 meters per second.
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