Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 17, Problem 54PQ
Using the concept of diffraction, discuss how the sound from a concert stage is affected if you sit behind a large pillar (greater than 1 m wide) near the middle of the concert hall. Is the answer different for treble (shorter-wavelength) or bass (longer-wavelength) sounds? Explain your answer.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
We know that a speaker that is 3m away from us is playing music at an intensity of 0.89W/m2. What is the power of this speaker?
Another speaker is playing at an intensity of 1.2W/m2 and a power of 2W. How far away is this speaker from us?
What is the difference between constructive and destructive interference? Give an example of each.
If you know that the interference of 2 waves creates a wavelength of a wave is 4.5m, can you determine if the interference is constructive or destructive? How do you know?
If one note has a frequency of 132Hz and another has a frequency of 148Hz. What is the beat frequency?
A vocal tract has a length of 15.3cm and is represented by the 3rd harmonic.
6a. How many nodes are there in the 3rd harmonic?
6b. What is the wavelength of the 3rd harmonic?
6c. What is the frequency of the 3rd harmonic?
6d. What is the wavelength of the 4th harmonic?…
a) Assume the speed of sound is 343 m/s in a room. What is the wavelength produced by a
tuning fork at 262 Hz? (this is approximately the frequency of middle C on a piano)
b) Let there be two speakers, A and B, emitting sound with matched phase. If a
microphone is originally exactly between A and B (so that the distance to each is L), how
far to the left do we need to move it so that the microphone detects destructive
interference?
c) Would a person at the position in (b) hear anything? Why?
d) If the microphone moves vertically on the page (let this be the y-axis) how does the total
intensity vary with vertical distance? Let each speaker emit intensity lo a distance 1
meter from the source.
e) How long would it take for a sound pulse to travel from A to B if L = 100 meters?
%3|
Suppose a flutist plays a 523-Hz C note with first harmonic displacement amplitude A1 = 100 nm. From as shown read, by proportion, the displacement amplitudes of harmonics 2 through 7. Take these as the values A2 through A7 in the Fourier analysis of the sound and assume B1 = B2 = ... = B7 = 0. Construct a graph of the waveform of the sound. Your waveform will not look exactly like the flute waveform as shown because you simplify by ignoring cosine terms; nevertheless, it produces the same sensation to human hearing.
Chapter 17 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 17.2 - As weve seen before, terms used in physics often...Ch. 17.2 - A graph of a pulses profile and a...Ch. 17.3 - Prob. 17.3CECh. 17.5 - Prob. 17.4CECh. 17.5 - The bulk modulus of water is 2.2 109 Pa (Table...Ch. 17.6 - Prob. 17.6CECh. 17 - A dog swims from one end of a pool to the opposite...Ch. 17 - Prob. 2PQCh. 17 - Prob. 3PQCh. 17 - Prob. 4PQ
Ch. 17 - Prob. 5PQCh. 17 - Prob. 6PQCh. 17 - Prob. 7PQCh. 17 - Prob. 8PQCh. 17 - A sinusoidal traveling wave is generated on a...Ch. 17 - Prob. 10PQCh. 17 - Prob. 11PQCh. 17 - The equation of a harmonic wave propagating along...Ch. 17 - Prob. 13PQCh. 17 - Prob. 14PQCh. 17 - Prob. 15PQCh. 17 - A harmonic transverse wave function is given by...Ch. 17 - Prob. 17PQCh. 17 - Prob. 18PQCh. 17 - Prob. 19PQCh. 17 - Prob. 20PQCh. 17 - Prob. 21PQCh. 17 - Prob. 22PQCh. 17 - A wave on a string with linear mass density 5.00 ...Ch. 17 - A traveling wave on a thin wire is given by the...Ch. 17 - Prob. 25PQCh. 17 - Prob. 26PQCh. 17 - Prob. 27PQCh. 17 - Prob. 28PQCh. 17 - Prob. 29PQCh. 17 - Prob. 30PQCh. 17 - Prob. 31PQCh. 17 - Problems 32 and 33 are paired. N Seismic waves...Ch. 17 - Prob. 33PQCh. 17 - Prob. 34PQCh. 17 - Prob. 35PQCh. 17 - Prob. 36PQCh. 17 - Prob. 37PQCh. 17 - Prob. 38PQCh. 17 - Prob. 39PQCh. 17 - Prob. 40PQCh. 17 - Prob. 41PQCh. 17 - Prob. 42PQCh. 17 - Prob. 43PQCh. 17 - Prob. 44PQCh. 17 - Prob. 45PQCh. 17 - What is the sound level of a sound wave with...Ch. 17 - Prob. 47PQCh. 17 - The speaker system at an open-air rock concert...Ch. 17 - Prob. 49PQCh. 17 - Prob. 50PQCh. 17 - Prob. 51PQCh. 17 - Prob. 52PQCh. 17 - Prob. 53PQCh. 17 - Using the concept of diffraction, discuss how the...Ch. 17 - Prob. 55PQCh. 17 - Prob. 56PQCh. 17 - An ambulance traveling eastbound at 140.0 km/h...Ch. 17 - Prob. 58PQCh. 17 - Prob. 59PQCh. 17 - Prob. 60PQCh. 17 - Prob. 61PQCh. 17 - In Problem 61, a. Sketch an image of the wave...Ch. 17 - Prob. 63PQCh. 17 - Prob. 64PQCh. 17 - Prob. 65PQCh. 17 - Prob. 66PQCh. 17 - Prob. 67PQCh. 17 - Prob. 68PQCh. 17 - Prob. 69PQCh. 17 - Prob. 70PQCh. 17 - A block of mass m = 5.00 kg is suspended from a...Ch. 17 - A The equation of a harmonic wave propagating...Ch. 17 - Prob. 73PQCh. 17 - Prob. 74PQCh. 17 - Prob. 75PQCh. 17 - Prob. 76PQCh. 17 - A siren emits a sound of frequency 1.44103 Hz when...Ch. 17 - Female Aedes aegypti mosquitoes emit a buzz at...Ch. 17 - A careless child accidentally drops a tuning fork...Ch. 17 - Prob. 80PQCh. 17 - A wire with a tapered cross-sectional area is...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A resonating glass tube closed at one end is 4 cm wide and 47 cm long. What are the frequencies and wavelengths of the first three harmonics for the resonating tube? The speed of sound in air is 343 m/s. Remember to include the following when answering these questions: What did you get? (your answer with the correct units and supporting work) How did you get that? (the equation you chose to use to get your answer) Why did you use that? (the concept that supports the use of the equation that you chose to use)arrow_forwardCan you show me how to solve this?arrow_forwardDo you hear a sound with maximum intensity, a sound with minimum intensity (ideally no intensity), or something in between at your location? Explain. You now go and stand directly in between the two speakers (0.375 m to the right of speaker 1 and 0.375 m to the left of speaker 2). Do you hear a sound with maximum intensity, a sound with minimum intensity (ideally no intensity), or something in between at your location? Explain.arrow_forward
- Two waves interfere. The intensity of one of them (alone) is 13.2 times the intensity of the other. What is the ratio of the maximum possible intensity to the minimum possible intensity of the resulting wave? Write your answe to one decimal point. Your Answer: Answerarrow_forwardANSWER THE FOLLOWING. NO SHORTCUTS AND SHOW YOUR SOLUTION.arrow_forwardYou are standing 2.5 m directly in front of one of the two loudspeakers shown in the figure. They are 3.0 m apart and both are playing a 686 Hz tone in phase. (Figure 1) Figure 3.0 m 2.5 m Walk 1 of 1 Part A As you begin to walk directly away from the speaker, at what distances from the speaker do you hear a minimum sound intensity? The room temperature is 20 °C. Express your answer numerically using two significant figures. If there is more than one answer, enter your answers in ascending order separated by commas. ► View Available Hint(s) x = ΑΣΦ 17.68,5.62,2.98 Submit Previous Answers Request Answer Review X Incorrect; Try Again; 5 attempts remaining marrow_forward
- Two speakers that are emitting sound with the same frequency in phase with each other and are separated by 3.00 m. Assume 1.50 m velocity of sound is 343 m/s a. If a person is standing 4.50 m down a line that perpendicularly 4.5 m 1.50 m bisects these speakers (as shown), will he hear constructive or destructive interference if the frequency of sound is 457 Hz? b. At this frequency how many wave lengths can fit in this distance from the speaker to him? c. If he walks 0.598 m vertically (direction shown in the picture as arrow) would he hear constructive or destructive interference? (show me) d. If he continues walking that direction, and moves 0.624 m further (1.222 m total) what does he hear now, constructive or destructive? (show me)arrow_forwardTwo violinists, Abby and Bob, sit 4m and 9.2m away from an orchestra conductor, respectively. The two violinists play the tuning-reference note (frequency of 440 Hz) with the same power. Treat the violinists as sources that emit uniformly in all directions. What is the ratio of the intensities of the two sounds at the location of the conductor ? TAbby's sound at conductor location i.e. calculate IBob's sound at conductor locationarrow_forwardPlease Help A harmonic plane wave in a water pond is moving in a particular direction thatwe can call x-axis. The wave has an amplitude of 0.5 m and a wavelength of 0.25m whereas its speed is 2 m/s. What is the angular frequency and angular wavenumber of this wave? How many waves fit in a length of 10 m. Suppose at t = 0there is a full peak at x = 0. What is the height of water at x = 2 m and x = 2.1 m atthis time? What is the height at these same points at t = 1 s?arrow_forward
- Suppose that two waves traveling in the same direction and with the same amplitude on a rope are interfered with. Let the amplitude of each wave be 9.8 mm and the phase difference of the two waves be 100 °. a) What is the amplitude of the total interfering wave and give information about the type of interference. b) What phase difference does two waves produce a total wave of 4.9 mm in amplitude ?arrow_forwardConsider the speaker set-up in the previous question. Each speaker emits a frequency of 6.6·102 Hz in phase with the other. The listener is seated directly in front of one speaker, 1.6 m away. The speakers are 2.4 m away from each other. How many extra wavelengths are needed for sound to get from speaker 2 to the listener? Take the speed of sound in air to be 3.4·102 m/s.arrow_forwardProblem 6: This problem will ask you about the basic concept of superposition of waves. Part (a) Superposition occurs during which of the following? Select all that apply. MultipleSelect : 1) When a single transverse wave is created with no reflections. 2) When waves pass through one another. 3) When a single transverse wave is created with reflections. 4) Only when smaller waves combine to create larger waves. Part (b) True or False: Destructive interference is the result of superposition of waves in phase. TrueOrFalse : 1) 2)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Spectra Interference: Crash Course Physics #40; Author: CrashCourse;https://www.youtube.com/watch?v=-ob7foUzXaY;License: Standard YouTube License, CC-BY