4. While waiting to cross a set of railroad tracks you hear a distant train horn. The train's engineer states that the frequency emitted by the horn is 400. Hz. The train is travelling at 30.0 m/s and the speed of sound on that day is 340. m/s. a) What would be the wavelength of the train's horn if it were at rest? b) What frequency would you hear after the train had passed the crossing? c) At what speed should the train be travelling so that the apparent frequency that you hear in part b) is 350 Hz?

4. While waiting to cross a set of railroad tracks you hear a distant train horn. The train's engineer states that the frequency emitted by the horn is 400. Hz. The train is travelling at 30.0 m/s and the speed of sound on that day is 340. m/s. a) What would be the wavelength of the train's horn if it were at rest? b) What frequency would you hear after the train had passed the crossing? c) At what speed should the train be travelling so that the apparent frequency that you hear in part b) is 350 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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