The speed of sound in air is 330 m s-¹1. A motorcyclist travelling at a speed of29 m s-¹ sounds the horn on their motorbikewhile passing a pedestrian beside the road.The rider hears the horn as a sound offrequency 250 Hz.a.What frequency does the pedestrian hear:i. when the motorcycle approaches?ii. when the motorcycle moves away?b. Explain why, when the motorcycle is right in front, the pedestrian hears the samefrequency as the rider.D

The speed of sound in air is 330 m s-¹ 1. A motorcyclist travelling at a speed of 29 m s-¹ sounds the horn on their motorbike while passing a pedestrian beside the road. The rider hears the horn as a sound of frequency 250 Hz. 53 ii. when the motorcycle moves away? b. Explain why, when the motorcycle is right in front, the pedestrian hears the same frequency as the rider. a. What frequency does the pedestrian hear: i. when the motorcycle approaches?

The speed of sound in air is 330 m s-¹ 1. A motorcyclist travelling at a speed of 29 m s-¹ sounds the horn on their motorbike while passing a pedestrian beside the road. The rider hears the horn as a sound of frequency 250 Hz. 53 ii. when the motorcycle moves away? b. Explain why, when the motorcycle is right in front, the pedestrian hears the same frequency as the rider. a. What frequency does the pedestrian hear: i. when the motorcycle approaches?

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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Concept explainers

Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.

Question

The speed of sound in air is 330 m s-¹
1. A motorcyclist travelling at a speed of
29 m s-¹ sounds the horn on their motorbike
while passing a pedestrian beside the road.
The rider hears the horn as a sound of
frequency 250 Hz.
a.
What frequency does the pedestrian hear:
i. when the motorcycle approaches?
ii. when the motorcycle moves away?
b. Explain why, when the motorcycle is right in front, the pedestrian hears the same
frequency as the rider.
D

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Step 2: Finds the frequency heard by the observer when the source is approaching and receding

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Step 3: Finds the frequency heard by the observer, when the source just infront of the observer.

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