Vice |S Suppose tnat a public address sy X +us.com9 Student Center A SaltBBLearn 6 My NAU P* SodexoAcademicWorks, Inc.My Bb Learn Tab 1...w Scholarships :)PRINTER VERSION1 BACKNEXTChapter 16, Problem 056Suppose that a public address system emits sound uniformly in all directions and that there are no reflections. The intensity at alocation 26 m away from the sound source is 3.0 x 10-4 W/m2. What is the intensity at a spot that is 89 m away?NumberUnitsthe tolerance is +/-5%SHOW HINTLINK TO TEXTBy accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by yourinstructor.Question Attempts: 0 of 6 usedSAVE FOR LATERSUBMIT ANSWEREarn Maximum Points available only if youanswer this question correctly in fourattempts or less.8:04 PM214/29/202019

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Answered: Vice | S Suppose tnat a public address…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 71P: Sound is more effectively transmitted into a stethoscope by direct contact rather than through the...

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Six members of a synchronized swim team wear earplugs to protect themselves against water pressure at depths, but they can still hear the music and perform the combinations in the water perfectly. One day, they were asked to leave the pool so the dive team could practice a few dives, and they tried to practice on a mat, but seemed to have a lot more difficulty. Why might this be?
A sunbather stands waist deep in the ocean and observes that six crests of periodic surface waves pass each minute. The crests are 16.00 meters apart. What is the wavelength, frequency, period, and speed of the waves?
What is the intensity in watts per meter squared of 85.0dB sound?
Ultrasonic sound waves are often used in methods of nondestructive testing. For example, this method can be used to find structural faults in a steel I-beams used in building. Consider a 10.00 meter long, steel I-beam with a cross-section shown below. The weight of the I-beam is 3846.50 N. What would be the speed of sound through in the I-beam? (Ysteel=200GPa,steel=159GPa) .
What is the necessary condition on the path length difference between two waves that interfere (a) constructively and (b) destructively?
A microphone receiving a pure sound tone feeds an oscilloscope, producing a wave on its screen. If the sound intensity is originally 2.00105W/m2 , but is turned up until the amplitude increases by 30.0% , what is the new intensity?
Waves on a swimming pool propagate at 0.750m/s. You splash the water at one end of the pool and observe the wave go to the opposite end, reflect, and return in 30.0 s. How far away is the other end of the pool?
What intensity level does the sound in the preceding problem correspond to?
Consider a stretched spring, such as a slinky. The stretched spring can support longitudinal waves and transverse waves. How can you produce transverse waves on the spring? How can you produce longitudinal waves on the spring?
Sound is more effectively transmitted into a stethoscope by direct contact rather than through the air, and it is further intensified by being concentrated on the smaller area of the eardrum. It is reasonable to assume that sound is transmitted into a stethoscope 100 times as effectively compared with transmission though the air. What, then, is the gain in decibels produced by a stethoscope that has a sound gathering area of 15.0 cm2, and concentrates the sound onto two eardrums with a total area of 0.900 cm2 with an efficiency of 40.0% ?
(a) If a submarine’s sonar can measure echo times with a precision of 0.0100 s, what is the smallest difference in distances it can detect? (Assume that the submarine is in the ocean, not in fresh water.) (b) Discuss the limits this time resolution imposes on the ability of the sonar system to detect the size and shape of the object creating the echo.
. A person stands directly in front of Iwo speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 7 in from one of the speakers and 7.2 in from the other. What is the frequency of the tone being emitted?

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