5. Train, look and listen. Consider a train that is about to enter a tunnel and is moving at a top speed of 54.0[kph]. To signal that the train is coming, the train driver blows a horn, producing sound of some frequency. A. At that time, the temperature of air is about 25.0°C. What is the speed of sound in air at this temperature? B. If the sound is reflected back by a wall at the opening of the tunnel, what is the ratio of the incident frequency and the received frequency heard by the train driver?

5. Train, look and listen. Consider a train that is about to enter a tunnel and is moving at a top speed of 54.0[kph]. To signal that the train is coming, the train driver blows a horn, producing sound of some frequency. A. At that time, the temperature of air is about 25.0°C. What is the speed of sound in air at this temperature? B. If the sound is reflected back by a wall at the opening of the tunnel, what is the ratio of the incident frequency and the received frequency heard by the train driver?

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 83P: A 4.0-m-long pipe, open at one end and closed at one end, is in a room where the temperature is...

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