If a sound with frequency fs is produced by a source traveling along a line with speed vs. If an observer is traveling with speed vo along the same line from the opposite direction toward the source, then the frequency of the sound heard by the observer is fo = c + vo c − vs fs where c is the speed of sound, about 332 m/s. (This is the Doppler effect.) Suppose that, at a particular moment, you are in a train traveling at 32 m/s and accelerating at 1.4 m/s2. A train is approaching you from the opposite direction on the other track at 48 m/s, accelerating at 1.8 m/s2, and sounds its whistle, which has a frequency of 427 Hz. At that instant, what is the perceived frequency that you hear? (Round your answer to one decimal place.) How fast is it changing? (Round your answer to two decimal places.)
If a sound with frequency fs is produced by a source traveling along a line with speed vs. If an observer is traveling with speed vo along the same line from the opposite direction toward the source, then the frequency of the sound heard by the observer is fo = c + vo c − vs fs where c is the speed of sound, about 332 m/s. (This is the Doppler effect.) Suppose that, at a particular moment, you are in a train traveling at 32 m/s and accelerating at 1.4 m/s2. A train is approaching you from the opposite direction on the other track at 48 m/s, accelerating at 1.8 m/s2, and sounds its whistle, which has a frequency of 427 Hz. At that instant, what is the perceived frequency that you hear? (Round your answer to one decimal place.) How fast is it changing? (Round your answer to two decimal places.)
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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If a sound with frequency fs is produced by a source traveling along a line with speed vs. If an observer is traveling with speed vo along the same line from the opposite direction toward the source, then the frequency of the sound heard by the observer is
fo =
fs
| c + vo |
| c − vs |
where c is the speed of sound, about 332 m/s. (This is the Doppler effect.) Suppose that, at a particular moment, you are in a train traveling at 32 m/s and accelerating at 1.4 m/s2. A train is approaching you from the opposite direction on the other track at 48 m/s, accelerating at 1.8 m/s2, and sounds its whistle, which has a frequency of 427 Hz. At that instant, what is the perceived frequency that you hear? (Round your answer to one decimal place.)
How fast is it changing? (Round your answer to two decimal places.)
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