College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 17, Problem 34PE
A commuter train blows its 200−Hz horn as it approaches a crossing. The speed at sound is 335 m/s. (a) An observer waiting at the crossing receives a frequency of 208 Hz. What is the speed of the train? (b) What frequency does the observer receive as the train moves away?
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An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 461 Hz when the train is approaching him and 441 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? (Assume the speed of sound in air is 343 m/s.)
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 463.0 Hz when the train is approaching him and 440.0 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? Assume the speed of sound is 343 m/s.
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Assume: The Speed of the sound is 344 m/s.
Chapter 17 Solutions
College Physics
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