54. Go A source of sound is located at the center of two concentricspheres, parts of which are shown in the drawing. The source emits sounduniformly in all directions. On the spheres are drawn three small patchesthat may or may not have equal areas. However, the same sound powerpasses through each patch. The source produces 2.3 W of sound power,and the radii of the concentric spheres are ra = 0.60 m and rg = 0.80 m.(a) Determine the sound intensity at each of the three patches. (b) Thesound power that passes through each of the patches is 1.8 × 10-³ W.Find the area of each patch.Patch 1Patch 2-Patch 3Source ofrBsound

Intensity is given as, I=PA=P4πr2

Answered: 54. Go A source of sound is located at…

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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*61. Deep ultrasonic heating is used to promote healing of torn tendons. It is produced by applying ultrasonic sound over the affected area of the body. The sound transducer (generator) is circular with a radius of 1.8 cm, and it produces a sound intensity of 5.9 × 10° W/m². How much time is required for the transducer to emit 4800 J of sound energy?
Two speakers emit sound waves of different frequencies as shown in the figure: Speaker A has a power of 1.00 mW and Speaker B has a power of 1.50 mW. A 4.00 mị В 3.00 m 2.00 m Quetion: When a single speaker A is turned on, how many dB is the sound level at point C?
Two speakers emit sound waves of different frequencies as shown in the figure: Speaker A has a power of 1.00 mW and Speaker B has a power of 1.50 mW. A 4.00 mi В 3.00 m 2.00 m (2.6 when speaker B is turned on at point c, how many dB ls the sound level at point C ,
*108. D A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 350. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 88 dB. What sound intensity level would the crew member experience if he removed the protective earplugs?
A sound wave travels from air (Z 413 kg m2 s1) to a liquid with a density of (950 kg m3) and a speed of sound in it (1-cm s 75000). 1) What percentage of the wave is reflected at the boundary? 2) What percentage of the wave travels across the boundary?
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Q3: A 1.0 W point source emits sound waves isotopically. Assuming that the energy of the waves is conserved, find the intensity (a) 1.0 m from the source and (b) 2.5 m from the source. (Hint: the area of the sphere is 4ar')
1. The low-frequency speaker of a stereo set has a surface area of A = 0.05 m? and produces 1 W of acoustical power. (a) What is the intensity at the speaker? (b) If the speaker projects sound uniformly in all directions, at what distance from the speaker is the intensity 0.1 W/m²?
You want to create a standing sound wave in its 2nd overtone. Your smartphone can generate any frequency you want. The only tube you have is 1.68m long. You can either block one end or not; it’s up to you. What frequency should you use? Draw the representation of the standing wave.
You hear a song from your playlist you haven't heard in a while and it warrants you to commence singing. As you are sing, the power of the compression wave you create is approximately 297.02 nW (note, nW is nano-Watts). What is the intensity of this sound as measured by your roommate who is standing 6.04m from you? Please give your answer in units of nW/m2. This unit is not a common one. Usually, the unit would simply be Watts per square-meter (which would be your answer divided by a million!). This goes to show you that are ears are amazingly sensitive to very tiny sound intensities. Note: Intensity was a topic covered in section 11.1, and I will provide the formula: I = P / A where P is the power in units of Watts, and A is the surface area of a sphere of radius "L" (in this problem).
While taking off, a jet engine emits 132.0 W of sound power as it reaches a height of 97 m. A small microphone with a 1.00 cm^2 area is on the ground directly below the jet. a) What is the sound intensity at the position of the microphone? b) What is the sound intensity level at the position of the microphone? c) How much sound energy impinges on the microphone in 4.0 s?
Part B A52-dB sound wave strikes an eardrum whose area is 5.0 x 10m The intensity of the reference level required to determine the sound level is 1.0 x 10-1 W/m 1 yr 3.156 x 107s At this rate, how long would it take the eardrum to receive a total energy of 1.0 J? Express your answer using two significant figures. ΑΣΦ t 3D yr Submit Request Answer Previous の hp hp f5 f6 f7 f8

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