The Doppler equation presented in the text is valid when the motion between the
ID: 2271893 • Letter: T
Question
The Doppler equation presented in the text is valid when the motion between the observer and the source occurs on a straight line so that the source and observer are moving either directly toward or directly away from each other. If this restriction is relaxed, one must use the more general Doppler equation
where ?0 and ?S are defined in Figure a. Use the preceding equation to solve the following problem. A train moves at a constant speed of 25.5 m/s toward the intersection shown in Figure b. A car is stopped near the crossing, 30.0 m from the tracks. The train's horn emits a frequency of 475 Hz when the train is 40.0 m from the intersection.
The Doppler equation presented in the text is valid when the motion between the observer and the source occurs on a straight line so that the source and observer are moving either directly toward or directly away from each other. If this restriction is relaxed, one must use the more general Doppler equation where ?0 and ?S are defined in Figure a. Use the preceding equation to solve the following problem. A train moves at a constant speed of 25.5 m/s toward the intersection shown in Figure b. A car is stopped near the crossing, 30.0 m from the tracks. The train's horn emits a frequency of 475 Hz when the train is 40.0 m from the intersection What is the frequency heard by the passengers in the car? If the train emits this sound continuously and the car is stationary at this position long before the train arrives until long after it leaves, what range of frequencies do passengers in the car hear? Suppose the car is foolishly trying to beat the train to the intersection and is traveling at 39.0 m/s toward the tracks. When the car is 30.0 m from the tracks and the train is 40.0 m from the intersection, what is the frequency heard by the passengers in the car now?Explanation / Answer
The Doppler equation presented in the text is valid when the motion between the
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