Fundamentals of Physics, Volume 1, Chapter 1-20
10th Edition
ISBN: 9781118233764
Author: David Halliday
Publisher: WILEY
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Textbook Question
Chapter 17, Problem 35P
A point source emits 30.0 W of sound isotropically. A small microphone intercepts the sound in an area of 0.750 cm2, 200 m from the source. Calculate (a) the sound intensity there and (b) the power intercepted by the microphone.
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Chapter 17 Solutions
Fundamentals of Physics, Volume 1, Chapter 1-20
Ch. 17 - In a first experiment, a sinusoidal sound wave is...Ch. 17 - In Fig. 17-25, two point sources S1, and S2, which...Ch. 17 - In Fig. 17-26, three long tubes A,B, and C are...Ch. 17 - Prob. 4QCh. 17 - In Fig. 17-27, pipe A is made to oscillate in its...Ch. 17 - Prob. 6QCh. 17 - Figure 17-28 shows a moving sound source S that...Ch. 17 - Prob. 8QCh. 17 - For a particular tube, here are four of the six...Ch. 17 - Prob. 10Q
Ch. 17 - You are given four tuning forks. The fork with the...Ch. 17 - Two spectators at a soccer game see, and a moment...Ch. 17 - What is the bulk modulus of oxygen if 32.0 g of...Ch. 17 - Prob. 3PCh. 17 - A column of soldiers, marching at 120 paces per...Ch. 17 - Prob. 5PCh. 17 - A man strikes one end of a thin rod with a hammer....Ch. 17 - SSM WWW A stone is dropped into a well. The splash...Ch. 17 - GO Hot chocolate effect. Tap a metal spoon inside...Ch. 17 - If the form of a sound wave traveling through air...Ch. 17 - Prob. 10PCh. 17 - SSM Diagnostic ultrasound of frequency 4.50 MHz is...Ch. 17 - The pressure in a traveling sound wave is given by...Ch. 17 - A sound wave of the form s = sm coskx t travels...Ch. 17 - Figure 17-32 shows the output from a pressure...Ch. 17 - GO A handclap on stage in an amphitheater sends...Ch. 17 - Two sound waves, from two different sources with...Ch. 17 - Prob. 17PCh. 17 - Prob. 18PCh. 17 - GO Figure 17-35 shows two isotropic point sources...Ch. 17 - Figure 17-36 shows four isotropic point sources of...Ch. 17 - SSM In Fig. 17-37, two speakers separated by...Ch. 17 - In Fig. 17-38, sound with a 40.0 cm wavelength...Ch. 17 - GO Figure 17-39 shows two point sources S1 and S2...Ch. 17 - Suppose that the sound level of a conversation is...Ch. 17 - A sound wave of frequency 300Hz has an intensity...Ch. 17 - Prob. 26PCh. 17 - SSM WWW A certain sound source is increased in...Ch. 17 - Two sounds differ in sound level by 1.00 dB. What...Ch. 17 - Prob. 29PCh. 17 - The source of a sound wave has a power of 1.00 W....Ch. 17 - GO When you crack a knuckle, you suddenly widen...Ch. 17 - Approximately a third of people with normal...Ch. 17 - Male Rana catesbeiana bullfrogs arc known for...Ch. 17 - GO Two atmospheric sound sources A and B emit...Ch. 17 - A point source emits 30.0 W of sound...Ch. 17 - Party hearing. As the number of people at a party...Ch. 17 - Prob. 37PCh. 17 - The water level in a vertical glass tube 1.00 m...Ch. 17 - Prob. 39PCh. 17 - Organ pipe A, with both ends open, has a...Ch. 17 - A violin siring 15.0 cm long and fixed at both...Ch. 17 - A sound wave in a fluid medium is reflected at a...Ch. 17 - SSM In Fig. 17-41, S is a small loudspeaker driven...Ch. 17 - The crest of a Parasaurolophus dinosaur skull is...Ch. 17 - In pipe A, the ratio of a particular harmonic...Ch. 17 - GO Pipe A. which is 1.20 m long and open at both...Ch. 17 - A well with vertical sides and water at the bottom...Ch. 17 - One of the harmonic frequencies of tube A with two...Ch. 17 - SSM A violin string 30.0 cm long with linear...Ch. 17 - Prob. 50PCh. 17 - The A string of a violin is a little too tightly...Ch. 17 - A tuning fork of unknown frequency makes 3.00...Ch. 17 - SSM Two identical piano wires have a fundamental...Ch. 17 - You have five tuning forks that oscillate at close...Ch. 17 - Prob. 55PCh. 17 - An ambulance with a siren emitting a whine at 1600...Ch. 17 - A state trooper chases a speeder along a straight...Ch. 17 - Prob. 58PCh. 17 - GO In Fig. 17-42, a French submarine and a U.S....Ch. 17 - A stationary motion detector sends sound waves of...Ch. 17 - GO A bat is flitting about in a cave, navigating...Ch. 17 - Figure 17-43 shows four tubes with lengths 1.0 m...Ch. 17 - ILWAn acoustic burglar alarm consists of a source...Ch. 17 - A stationary detector measures the frequency of a...Ch. 17 - GO A 2000 Hz siren and a civil defense official...Ch. 17 - GO Two trains are traveling toward each other at...Ch. 17 - SSM WWWA girl is sitting near the open window of a...Ch. 17 - Prob. 68PCh. 17 - SSMA jet plane passes over you at a height of 5000...Ch. 17 - A plane flies at 1.25 times the speed of sound....Ch. 17 - At a distance of 10 km, a 100 Hz horn, assumed to...Ch. 17 - A bullet is fired with a speed of 685 m/s. Find...Ch. 17 - Prob. 73PCh. 17 - The average density of Earths crust 10 km beneath...Ch. 17 - A certain loudspeaker system emits sound...Ch. 17 - Find the ratios greater to smaller of the a...Ch. 17 - Prob. 77PCh. 17 - A trumpet player on a moving railroad flatcar...Ch. 17 - GO In Fig. 17-46, sound of wavelength 0.850 m is...Ch. 17 - GO A detector initially moves at constant velocity...Ch. 17 - SSMa If two sound waves, one in air and one in...Ch. 17 - A continuous sinusoidal longitudinal wave is sent...Ch. 17 - SSMUltrasound, which consists of sound waves with...Ch. 17 - The speed of sound in a certain metal is vm. One...Ch. 17 - An avalanche of sand along some rare desert sand...Ch. 17 - A sound source moves along an x axis, between...Ch. 17 - SSMA siren emitting a sound of frequency 1000 Hz...Ch. 17 - Prob. 88PCh. 17 - Prob. 89PCh. 17 - Prob. 90PCh. 17 - Prob. 91PCh. 17 - You can estimate your distance from a lightning...Ch. 17 - SSMFigure 17-48 shows an air-filled, acoustic...Ch. 17 - Prob. 94PCh. 17 - SSMThe sound intensity is 0.0080 W/m2 at a...Ch. 17 - Four sound waves are to be sent through the same...Ch. 17 - Prob. 97PCh. 17 - A point source that is stationary on an x axis...Ch. 17 - You are standing at a distance D from an isotropic...Ch. 17 - Pipe A has only one open end; pipe B is four times...Ch. 17 - A pipe 0.60 m long and closed at one end is filled...Ch. 17 - A sound wave travels out uniformly in all...Ch. 17 - A police car is chasing a speeding Porsche 911....Ch. 17 - Suppose a spherical loudspeaker emits sound...Ch. 17 - In Fig. 17-35. S1 and S2 are two isotropic point...Ch. 17 - Prob. 106PCh. 17 - Kundts method for measuring the speed of sound. In...Ch. 17 - Prob. 108PCh. 17 - In Fig. 17-53, a point source S of sound waves...Ch. 17 - A person on a railroad car blows a trumpet note at...Ch. 17 - A listener at rest with respect to the air and the...
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- A sound wave in air has a pressure amplitude equal to 4.00 103 Pa. Calculate the displacement amplitude of the wave at a frequency of 10.0 kHz.arrow_forwardA pipe is observed to have a fundamental frequency of 345 Hz. Assume the pipe is filled with air (v = 343 m/s). What is the length of the pipe if the pipe is a. closed at one end and b. open at both ends?arrow_forwardA sound wave traveling in air has a pressure amplitude of 0.5 Pa. What is the intensity of the wave?arrow_forward
- Some studies suggest that the upper frequency limit of hearing is determined by the diameter of the eardrum. The wavelength of the sound wave and the diameter of the eardrum are approximately equal at this upper limit. If the relationship holds exactly, what is the diameter of the eardrum of a person capable of hearing 20 000 Hz? (Assume a body temperature of 37.0C.)arrow_forwardThe area of a typical eardrum is about 5.00 X 10-5 m2. (a) (Calculate the average sound power incident on an eardrum at the threshold of pain, which corresponds to an intensity of 1.00 W/m2. (b) How much energy is transferred to the eardrum exposed to this sound lor 1.00 mill?arrow_forwardWrite an expression that describes the pressure variation as a function of position and time for a sinusoidal sound wave in air. Assume the speed of sound is 343 m/s, = 0.100 m, and Pmax = 0.200 Pa.arrow_forward
- The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound wave increase if the sound intensity level goes up by 40.0 dB?arrow_forwardA flute has a length of 58.0 cm. If the speed of sound in air is 343 m/s, what is the fundamental frequency of the flute, assuming it is a tube closed at one end and open at the other? (a) 148 Hz (b) 296 Hz (c) 444 Hz (d) 591 Hz (e) none of those answersarrow_forwardTwo sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00 m-1, an angular frequency of =2.50 s-1, and a period of 6.00 s, but one has a phase shift of an angle =12 rad. What is the height of the resultant wave at a time t=2.00 s and a position x=0.53 m?arrow_forward
- Based on the graph in Figure 17.36, what is the threshold of hearing in decibels for frequencies of 60, 400, 1000, 4000, and 15,000 Hz? Note that many AC electrical appliances produce 60 Hz, music is commonly 400 Hz, a reference frequency is 1000 Hz, your maximum sensitivity is near 4000 Hz, and many older TVs produce a 15,750 Hz whine. Figure 17.36 The relationship of loudness in phons to intensity level (in decibels) and intensity (in watts per meter squared) for persons with normal hearing. The curved lines are equal-loudness curves—all sounds on a given curve are perceived as equally loud. Phons and decibels are defined to be the same at 1000 Hz.arrow_forwardA sound wave can be characterized as (a) a transverse wave, (b) a longitudinal wave, (c) a transverse wave or a longitudinal wave, depending on the nature of its source, (d) one that carries no energy, or (e) a wave that does not require a medium to be transmitted from one place to the other.arrow_forwardCheck Your Understanding Identify common sounds at the levels of 10 dB, 50 dB, and 100 dB.arrow_forward
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