A police siren has a frequency of 340.0 Hz when the car is stationary and the temperature is 20°C. The police car at point S moves to the right with a speed of 22.0 m/s. What frequency does observer A hear?fAHzWhat frequency does observer B hear?fB =HzSuppose observer A is moving toward the stationary police car. What is the speed of observer A if the frequency heard is 369 Hz?VA =m/s

Given: Frequency of siren = 340 Hz Temperature = 20 degree C Speed of car = 22 m/s

Answered: A police siren has a frequency of 340.0…

A police siren has a frequency of 340.0 Hz when the car is stationary and the temperature is 20°C. The police car at point S moves to the right with a speed of 22.0 m/s.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 122P: An airplane is flying at Mach 1.50 at an altitude of 7500.00 meters, where the speed of sound is...

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Concept explainers

Interference of sound

Seiche

A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.

Question

A police siren has a frequency of 340.0 Hz when the car is stationary and the temperature is 20°C. The police car at point S moves to the right with a speed of 22.0 m/s.

What frequency does observer A hear?
fA
Hz
What frequency does observer B hear?
fB =
Hz
Suppose observer A is moving toward the stationary police car. What is the speed of observer A if the frequency heard is 369 Hz?
VA =
m/s

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