EXAMPLE 14.4GOAL Solve a Doppler shift problem when only the source is moving.Listen, but Don't Stand on the TrackPROBLEM A train moving at a speed of 40.0 m/s sounds its whistle, which has a frequency of5.00 x 10² Hz. Determine the frequency heard by a stationary observer as the train approaches theobserver. The ambient temperature is 24.0°C.STRATEGY Get the speed of sound at the ambient temperature using the relevant equation, thensubstitute values into the Doppler shift equation. Because the train approaches the observer, the observedfrequency will be larger. Choose the sign of vs to reflect this fact.SOLUTIONCalculate the speed of sound in air at T= 24.0°C.The observer is stationary, so vo = 0.The train is moving toward theobserver, so vs = 40.0 m/s (positive).Substitute these values and the speedof sound into the Doppler shiftequation.V = (331 m/s) √T/ 273 K= (331 m/s) √(273 + 24.0) K/ 273 K =$ (v + √² ) =fo=fs (= 566 Hz= (5.00 x 10² Hz)345 m/s345 m/s345 m/s - 40.0 m/s PRACTICE ITUse the worked example above to help you solve this problem. A train at a speed of 36.4 m/s sounds itwhistle, which has a frequency of 5.06 x 10² Hz. Determine the frequency heard by a stationary observeras the train approaches the observer. The ambient temperature is 21.7°C.HzEXERCISEHINTS: GETTING STARTED | I'M STUCK!Determine the frequency heard by the stationary observer as the train recedes from the observer.Hzfrequency=

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PRACTICE IT Use the worked example above to help you solve this problem. A train at a speed of 36.4 m/s sounds it whistle, which has a frequency of 5.06 x 10² Hz. Determine the frequency heard by a stationary observer as the train approaches the observer. The ambient temperature is 21.7°C. Hz EXERCISE HINTS: GETTING STARTED I'M STUCK! Determine the frequency heard by the stationary observer as the train recedes from the observer. frequency = Hz

PRACTICE IT Use the worked example above to help you solve this problem. A train at a speed of 36.4 m/s sounds it whistle, which has a frequency of 5.06 x 10² Hz. Determine the frequency heard by a stationary observer as the train approaches the observer. The ambient temperature is 21.7°C. Hz EXERCISE HINTS: GETTING STARTED I'M STUCK! Determine the frequency heard by the stationary observer as the train recedes from the observer. frequency = Hz

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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Please provide details about your resolution process. Please show complete, organized and correct work for each question. Questions without complete and clear work will earn no points. You’re welcome to use your textbook and notes, but no calculators. One way to tune a piano is to strike a tuning fork (which emits only one specific frequency), then immediately strike the piano key for the frequency being sounded by the fork, and listen for beats. If the frequency of an out-of-tune A4string is 420.0 Hz, and a tuner strikes an A4 tuning fork (frequency 440.0 Hz),a. …what beat frequency will the tuner hear?a) ????? = _____________________b. …and what frequency note will the tuner hear?b) ????? = _____________________
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