College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
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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A train approaching a station at the speed of 31.0 m/s sounds the 2400-Hz whistle. Assume the weather conditions (temperature, pressure, humidity) as such that the speed of sound in the air is 341.0 m/s. What is the apparent frequency heard by an observer standing at the station?What is the change in frequency heard as the train passes by?
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Chapter 17 Solutions
College Physics
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