27. On a day when there is no wind, a loudspeaker S is placed at each goalpost at one end of afootball field. The loudspeakers are in phase and are emitting sounds of the same constantfrequency and intensity. The boys in a class are asked to find positions on the field where thesound is faintest and the girls to find positions where the sound is loudest. The positions taken areshown in the diagram below.QQ0Q♂ Qd dddd ರSSㅇ 어둠BoyGirlWhich student is at a position which best satisfies the conditions X = 3^?L 2dX = the distance from the student to the right bisector of the line joining theloudspeakersL = the distance of the student from the midpoint between the sources speakersA = the wavelength of the sound from the speakersd = the distance between the speakers(a) 2 (b) 4 (c) 5 (d) 6 (e) 7

Step 1: Step 2: Step 3: Step 4:

Answered: 27. On a day when there is no wind, a…

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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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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A bass string has a mass per unit length of 0,008 kg/m. The bass is 0.9 m long and the string is placed under 100 N of tension. What is the fundamental frequency this string vibrates at? What is the frequency of the 3rd Harmonic?
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Which of the following statements are true? Which one or more? a. The pitch of the voice is affected by the amplitude of vibration of the vocal cords, but not by frequency dependent acoustic resonance. b. D The low frequency range which contains the consonants is more important for understanding speech than the high frequency range from about 1 k Hz to 5 k Hz which contains the vowels. c. The high frequency range from about 1 k Hz to 5 k Hz which contains the consonants is more important for understanding speech than the low frequency range which contains the vowels. d. The pitch of speech sounds is produced by articulation or movement of the tongue, lips, lower jaw and soft palate to modify the airflow.

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