13. The warning tag on a lawn mower states that it produces noise at a level of 91.0 dB. What is this in watts per meter squared?

Q: If the intensity of a sound wave increases by 2%, what is the change in the sound level of the wave?…

A: let initial intensity = 100 W/m2 β = 10 log (I/Io)β = 10 log ( 100 / 10-12)β = 140 dB  New intensity…

Q: 10. Determine the number of decibels from a Jack Hammer with sound intensity of 3.2 x 10 wattsim²

A:

Q: A point source emits sound waves with a power output of 237 watts. What is the sound level (in dB)…

A: I = P / 4πr2  P= 237 watts  r = 21.3 m

Q: The noise a lawn mower produces is 80 dB. How much noise is from 12 identical lawn mowers?

A: Noise = 80dB  Let I is the intensity of one lawn mowers , Then for 12 lawn mowers, the intensity is…

Q: 6. A sound source moves through air toward a stationary observer. The frequency of the sound the…

A: The expression for the Doppler’s effect is, Here, v0 is the speed of the observer, vs is the speed…

Q: The noise a   lawn mower produces is  80 dB. How much noise is from 5 identical lawn mowers?

A: Given that the noise a single on more producers is 80 dB. And we can assume the intensity of single…

Q: A sound wave is travelling in air has a frequency of 775 Hz, What is the wavelength of the wave in…

A:

Q: 6) If the full wavelength of a 440 Hz sound in a liquid is 3.3 m, what is the speed of sound in that…

A:

Q: A sound wave is travelling in air has a frequency of 475 Hz, What is the wavelength of the wave in…

A: Given data: The frequency of wave is f=475 Hz. The temperature of air is T=25°F.

Q: The sound emitted by bats has a wavelength of 0.0069 m at 343 m/s. What is the sound's frequency in…

A: Speed of wave (V) = wavelengthλ * Frequencyν

Q: A sound has an intensity of 5 x 10^(-7) watt per sq. m. What is its intensity level? *

A:

Q: 9. Determine the number of decibels from a normal conversation with sound intensity of 10 wattslm.

A: Answer: Given data,  Intensity of sound (I)=10-8 watts/m2

Q: The wavelength of a certain sound source is 2.4 mm in air and the speed of sound in air is 345 m/s.…

A: Write the equation relating frequency, wavelength and velocity

Q: The speed of sound in air is 330.2 m/s. what is the frequency of a soundwave that has a wavelength…

A:

Q: 10. Determine the number of decibels from a Jack Hammer with sound intensity of 3.2 x 10a wattsim?

A:

Q: A sound wave is travelling in air has a wavelength of 0.46 m, What is the frequency of the wave in…

A:

Q: 6. The speed of sound wave depends on ______________. A. pitch B. loudness. C. temperature D.…

A: The speed of sound wave is proportional to the square root of the absolute temperature.

Q: What frequency of sound traveling in air at 40 0C has a wavelength of 0.50 m?

A: The formula for the velocity in terms of temperature is:

Q: The noise a   lawn mower produces is  80 dB. How much noise is from 8 identical lawn mowers?

A: Given , the noise a single lawn mower produces  Is 80 dB  Let I is the intensity of one lawn mower,…

Q: The warning tag on a lawn mower states that it produces noise at a level of 93 dB. What is this in…

A:

Q: The noise a   lawn mower produces is  80 dB. How much noise is from 2 identical lawn mowers?

A: Given: β1=80 dB

Q: What is the speed, in m/s, of sound in air?

A: The speed of sound changes with change of temperature.

Q: What sound intensity level corresponds to a sound intensity of 6.96 x 10-3 W / m2

A: we know that,sound intensity in dBi=10log10(ii0)

Q: How much power does a source of sound could generate if the intensity is 3.4x10^-5 W/m2 at a…

A:

Q: 7) If sound with a frequency of 442 Hz travels through a metal with a lowest (%) wavelength of 5.83…

A: Wavelength of sound  Frequency of sound

Q: 69. The bellow of a territorial bull hippopotamus has been measured at115 dB above the threshold of…

A: Given : β=115 db As we know , the sound intensity is given as :

Q: The warning tag on a lawn mower states that it produces noise at a level of 96.0 dB. What is this in…

A:

Q: What is the frequency heard by a person driving at 11 m/s away from a blowing siren of frequency.…

A: Given:  velocity of source of sound, vs = 0 m/s  velocity of listener, vL = 11 m/s  frequency of…

Q: Most people can detect frequencies as high as 20 000 Hz. Assuming the speed of sound in air is 345…

A:

Q: a noise level meter reads the sound level in a room to be 85 dB. What is the intensity of sound in…

A: Given sound level 85dB We know sound level in dB is  dB=10log( I/I0) where l is intensity of sound…

Q: The noise a   lawn mower produces is  80 dB. How much noise is from 3 identical lawn mowers?

A: Given  Noise produced by one mower =80dB no of identical mowers x=3

Q: Determine the frequency of a sound wave if it has a speed of 350 m/s and a wavelength of 2.50 m. Hz

A: Frequency will be 140 Hz.

Q: 53. Determine the number of decibels that corresponds to cach of the following intensities. a. 10-12…

A:

Q: 16

A: Given: Power, P= 288 Watts Distance, r=69.7 m   To find sound level at r=69.7 m in dB.

Q: 9. Sound intensity level, which measures the loudness of a sound perceived by human ear is measured…

A: Introduction: The intensity of sound is the power carried by the sound wave per unit area in a…

Q: A sound wave is travelling in air has a wavelength of 0.42 m, What is the frequency of the wave in…

A: wavelength of sound wave = 0.42 m Temperature = 20 degree Fahrenheit

Q: What are the factors that determines loudness of a sound?

A: Loudness of the sound depends on the  intensity of the sound. Loudness of the sound is calculated in…

Q: If the speed of sound is 335.6 m/s and the wavelength of the sound is 1.44 cm, what is the frequency…

A:

Q: ts Karen shouts across a canyon and hears an echo 8.7 s later. How wide is the canyon? The speed of…

A: Let us assume that  Karen starts shouting at t=0 She heards an echo after t =8.7 s Speed of sound =…

Q: Sound travels at 1540 m/s in body tissue. If an ultrasound device sends out a frequency of 10 MHz…

A: The velocity of the sound, v = 1540 m/s The frequency of the sound, f = 10 MHz = 107 Hz = 107/s

Q: 1 What frequency of sound traveling in air at 32^ = Chas a wavelength of 0.36 m? Calculate to one…

A: Recall V=fλ So f=v/λ Where v=speed of sound             λ=wavelength of soundf=frequency of sound

Q: Calculate the sound level in decibels of a sound wave that has an intensity of 94 µ W/m2.

A:

Q: What frequency of sound traveling in air at 32 C has a wavelength of 0.36 m?

A: Given: Critical temperature (Tc) = 32 ℃ Wavelength (λ) = 0.36 m

Q: A point source emits sound waves with a power output of 397 watts. What is the sound level (in dB)…

A: Data Given ,  Power output ( P ) = 397 watts Distance ( d ) = 44.3 m Formula of Sound level -  L =…

Q: A sound wave is travelling in air has a wavelength of 0.44 m, What is the frequency of the wave in…

A: The relation between Fahrenheit (F) and Celsius (C) is given by :