15.1 Find the intensity I of the sound waves producedby one 60-W speaker at a distance of 1.5 m.Express your answer numerically in watts persquare meter. Use two significant figures.I=ΑΣΦSubmitPart CRequest AnswerFind the intensity I of the sound waves producedby four 60-W speakers as heard by the driver.Assume that the driver is located 1.0 m from eachof the two front speakers and 1.5 m from each ofthe two rear speakers.? A popular car stereo has four speakers, each rated at60 W. In answering the following questions, assumethat the speakers produce sound at their maximumpower.Part AFind the intensity I of the sound waves producedby one 60-W speaker at a distance of 1.0 m.Express your answer numerically in watts persquare meter. Use two significant figures.I=ΑΣΦĆ?

The intensity of sound waves produced by a single speaker at a distance r can be calculated using…

A popular car stereo has four speakers, each rated at 60 W. In answering the following questions, assume that the speakers produce sound at their maximum power. Part A Find the intensity I of the sound waves produced by one 60-W speaker at a distance of 1.0 m. Express your answer numerically in watts per square meter. Use two significant figures. Ć

A popular car stereo has four speakers, each rated at 60 W. In answering the following questions, assume that the speakers produce sound at their maximum power. Part A Find the intensity I of the sound waves produced by one 60-W speaker at a distance of 1.0 m. Express your answer numerically in watts per square meter. Use two significant figures. Ć

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 52P: (a) If a submarine’s sonar can measure echo times with a precision of 0.0100 s, what is the smallest...

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(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.
Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the eardrum is about 8.4 mm in humans. When someone speaks to you in a normal tone of voice, the sound intensity at your ear is approximately 1.0 × 10-6 W/m². What is the power delivered to your eardrum? Express your answer in watts. P = 17 ΑΣΦ ? W
Find the wavelength in air of an 22-Hz sound wave at 486 m/s, which is one of the lowest frequencies that are detectable by the human ear. No need to include the unit. Write your answer in whole numbers.
Two sound waves have intensities of 1 times 10 to the -5 W/m2 and 5 times 10 to the -4 W/m2. What is the difference in their intensities levels (db)? I0 = 10 to the -12 W/m2.
Sound waves travel at roughly 340 m/s at room temperature. The minimum hearing range of a human is 20Hz. a) What is the wavelength of this wave? b) Could this wavelength fit inside the dimensions of Room 411( room dimensions are roughly 11.5 m x 8.7 m)? Justify your answer with sound reasoning (pun intended :-))
Find the range of wavelengths emitted by the bat in meters, by using that the speed of sound is c=343m/sec and the range of frequencies from 70 to 30KHz. The solution matches the range of sizes for an insect. What is the order of magnitude for this range? Take this order and call it L for the average size of an insect. b) If the bat produces a power of P = 10^-5 watts and its hearing threshold is 10^-12 watts/m^2 what is the maximum distance from which the bat can detect an echo?
An individual can hear sound waves from 20 Hz to 20 kHz. If the speed of sound is 340 m/s, what is the wavelength limit of the highest frequency? Answer must be given in cm units.
An echocardiogram can measure the Doppler shift of the sound reflected from flowing blood. A sound wave of 5 MHz is used to image the heart and a shift of 100 Hz is detected from a region of flowing blood. What is the blood's speed? [Note: The speed of sound in heart tissue is about 1500 m/s.] *Clarification: The frequency is shifting up. That is, the new fewquency is (5MHZ + 100 Hz).
The human ear can detect a minimum intensity of Io = 10-12 W/m2, which has a sound intensity of 0 dB.Randomized Variablesβ = 25 dB If the student hears a sound at 25 dB, what is the intensity of the sound?Numeric : A numeric value is expected and not an expression.I = __________________________________________
As we said, sound waves can be modeled with sine waves. The standard musical pitch is the A440 which means that the musical note A4 has a frequency of 440 Hz. So this note oscillates once every seconds and it could be modeled using the curve y = sin(440- 2nt) = sin(880nt). For each of the following musical notes, what would w be if we wanted to model the sound wave with y = sin(wt)? !! %3D (a) (i) C4, (261.63 Hz (iii) E4, (329.63 Hz) (v) G4, (392 Hz) (ii) D4, (293.66 Hz) (iv) F4, (349.23 Hz) (vi) B4, (493.88 Hz)
A DJ is setting up their equipment and measures the sound level near a speaker to be 44.72dB. They decide to add two more speakers next to the first. What would they measure the new sound level to be?
The speed of sound at 0°C in open air is 331.3m/sec. At what temperature would the wavelength of a 440Hz sound wave be 0.82meters.