Problem-3: While driving down the road, you spot a friend standing on the sidewalk. You honk your horn at them while driving 60 km/h. Your horn emits a frequency of 330 Hz. a) What frequency does your friend hear as you approach? (Answer:347 Hz) b) What frequency does your friend hear after you pass by? (Answer:315 Hz)

Problem-3: While driving down the road, you spot a friend standing on the sidewalk. You honk your horn at them while driving 60 km/h. Your horn emits a frequency of 330 Hz. a) What frequency does your friend hear as you approach? (Answer:347 Hz) b) What frequency does your friend hear after you pass by? (Answer:315 Hz)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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An observer is riding a bike with a speed of 5 m/s. The ice cream van emitting a sound with anatural frequency of 600 Hz is coming up from behind the cyclist with a speed of 25 m/s.The siren making the sound is inside the cabin with the ice cream vendor.a) What is the frequency of the sound heard by the ice cream vendor inside the vehicle?b) What is the wavelength of the sound waves as detected by the ice cream vendor inside thevehicle?c) What is the frequency of the sound heard by the cyclist?d) What is the wavelength of the sound waves as detected by the cyclist?
BF-4 Anabella is standing on the sidewalk as two fire engines traveling in the same direction pass her as shown below. Both fire engines produce the same frequency 1,500Hz. Engine #1 V₁=25.0m/s Anabella Engine #2 V₂=35.0m/s a) What is the frequency Anabella hears from engine #1? Use the speed of sound as 343.0m/s. b) What is the frequency Anabella hears from engine #2? Use the speed of sound as 343.0m/s. c) What beat frequency does Anabella hear?
Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 436 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.) m/s
A dolphin is swimming at 10 metres per second towards a scuba diver. The dolphin is emitting a ‘welcome’cry which has a frequency of 2980 Hz. What is the frequency that the diver hears underwater?
You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind and you perceive the frequency as 1370 Hz. You are relieved that he is in pursuit of a different speeder when he continues past you, but now you perceive the frequency as 1330 Hz. What is the speed of the police car? The speed of sound in air is 343 m/s.
A train approaches a station and sounds it's horn which has a natural frequency of 150 Hz. The train is traveling at 35.0 m/s and the speed in air is 340 m/s. A) What frequency does a person standing at the station hear? B) What frequency does a person sitting on the train hear?
A convertible moves toward you and then passes you; all the while, its loudspeakers are producing a sound. The speed of the car is a constant 13.5 m/s, and the speed of sound is 344 m/s. What is the ratio of the frequency you hear while the car is approaching to the frequency you hear while the car is moving away?
Doppler Effect: A factory siren indicating the end of a shift has a frequency of 80 Hz where the speed of sound in air is 343 m/s. a)What frequency is perceived by the occupant of a car that is traveling at 30 m/s towards the factory? b)What frequency is perceived by the occupant of a car that is traveling at 30 m/s away from the factory?
A truck travelling west at 60 m/s sounds it's 440 hz horn as it passes an observer riding a bike traveling east at 20 m/s. What frequency does the observer hear as the car approaches?
Two trains on separate tracks move toward each other. Train 1 has a speed of 149 km/h; train 2, a speed of 95.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1?
Problem-4: Two students standing 54.9 m apart are tossing around footballs designed to whistle while they are airborne. a) When student A throws their football toward student B at 16.0 m/s it emits a frequency of 690 Hz. What frequency is heard by student B? (Answer:724 Hz) b) When student B throws their football toward student A at 15.0 m/s it emits a frequency of 610 Hz. What frequency is heard by student A? (Answer:638 Hz) c) If the two footballs are thrown simultaneously, what is the difference in frequencies detected by student A? (Answer:21 Hz) d) If the two footballs are thrown simultaneously, what is the difference in frequencies detected by student B? (Answer:140 Hz)
A) a guitar player sounds C above middle C (522 Hz) while traveling in a convertible at 35m/s. If the car is coming toward you, what frequency would you hear? Use 343 m/s as the speed of sound. B) repeat the problem above, but with the car moving away from you. What frequency would you hear?