Leaf Blower The intensity of the sound from a certain leaf blower is measured at 3.2 x 10-2 W/m2. Find the decibel level.

Q: What is the intensity heard a distance of 3.40 m away from a speaker that emits sound in each…

A: I=P4πR2

Q: A sound wave in air at 20? C has a frequency of 150 hz and a displacement amplitude of 5m. For this…

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Q: If the distance from a source of sound increases by I meter, the sound level is decreased by 2 dB.…

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Q: Question 9 Find the wavelength in air of an 95-Hz sound wave at 311 m/s, which is one of the lowest…

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Q: 23. Two sounds are measured for their loudness in decibels. The crowd at a packer game produces a…

A: Given, oo Sound intensity of crowd = 130 dB  Sound intensity of lawnmower = 90 dB  The relationship…

Q: 9. Determine the number of decibels from a normal conversation with sound intensity of 10 wattsim².…

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Q: A 500-Hz sound travels through pure oxygen. The wavelength of the sound is measured to be 0.65 m.…

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Q: sound

A: The sound energy is transmitted in the medium through vibrations. The amplitude of a wave is…

Q: Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of…

A: We know that   v = 331m/s + 0.6m/s/C * T     here T is in celcius

Q: A bat moving with a speed of 2.75 m/s and . emitting sound of 38.0 kHz approaches a moth at rest on…

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Q: Sound intensity The sound intensity level formula is a = 10 log (I/I). (a) Solve for I in terms of a…

A: (a)  α = 10 logIIologIIo = α10Take antilog on both the sidesIIo = 100.1 αI = Io×100.1 α

Q: police car siren has a frequency of 850 Hz. If you hear this siren to have a frequency that is…

A: Given that            Car siren has a frequency of (fsource) = 850Hz            The frequency that…

Q: The noise level in an empty examination hall (ambient noise) is 40 dB. When 100 students are writing…

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Q: A bat can detect small objects that are roughly the same size as the wavelength of the sound they…

A: Given data: Frequency (f) = 60 kHz Speed (v) = 330 m/s Required: Wavelength (λ)

Q: You hear a noise with an intensity of 6.5 × 10-4 Watts/m2. Calculate the intensity in decibels. Use…

A: Part (1): Given: The intensity is 6.5x10-4 W/m2.

Q: Sound. Calculate the decibels associated with attending a football game in a loud college stadium if…

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Q: 3. Complete the chart below for a 50 cm string with a fundamental frequency of 100 Hz

A: .

Q: A dolphin is swimming at 20.00meters per second towards a scuba diver. The dolphin is emitting a…

A: Using Doppler effect, the frequency heard by the diver can be given as

Q: The intensity of the sound from a certain leaf blower is measured at  25 × 10−2 W/m2.  Find the…

A: The intensity of the sound is I = 25×10-2 W/m2

Q: A 760- Hz sound travels through pure neon. The wavelength of the sound is measured to be 0.57 m.…

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Q: 08 A S11 Highest to lowest, rank the pitch heard when blowing across each bottle:

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Q: Elephants can communicate over distances as far as 6 km by using very low-frequency sound waves.…

A: To determine: The wavelength of the sound wave emitted by an elephant

Q: The noise a   lawn mower produces is  80 dB. How much noise is from 11 identical lawn mowers?

A: Given  Noise produced by one lawn mower =80dB No of lawn mowers x=11

Q: A certain noise produces 6.2x10^-4 w/m^2 of power. What is the decibel level of this noise? Given…

A: Given value--- I = 6.2 × 10-4 W/m2 . I0 = 10-12 W/m2 . We have to find--- sound level ?

Q: Sound intensity varies inversely as the square of the distance from the sound source. If you are in…

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Q: Subway Noise The decibel level of the sound of a subway train was measured at 98 dB. Find the…

A: Decibel of sound =β= 98 dB Say intensity of the sound is I and following relation will be used:…

Q: A bat is flitting about in a cave, navigating via ultrasonic bleeps.Assume that the sound emission…

A: The frequency of the heard by the bat reflected off the wall is given by,

Q: The intensity of sound A is three times the intensity of sound B. Find the difference in their…

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Q: The intensity of the sound of traffic at a busy intersection was measured at 7.0 x 10-5 w/m2. Find…

A: Given data The intensity of sound at traffic is: I = 7 x 10-5 W/m2   The expression for the decibel…

Q: A concert loudspeaker suspended high off the ground emits 35 W of sound power. A small microphone…

A: The power source,   The distance,

Q: Sound becomes hazardous noise pollution at decibels?   A) above 120 db B) above 80 db C) above 50 db…

A: For humans, normal sound loudness is 60 to 70 decibels(dB). For any sound above 120 dB, it is…

Q: What is your measurement of speed of sound in air in m/s? The number should have three significant…

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Q: On the planet Arrakis, a male ornithoid flies toward his female companion at 25.0 m/s while singing…

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Q: The intensity level of sound in a truck is 90 dB. What is the intensity of this sound? Express your…

A: Intensity level is given by,

Q: A bystander hears a siren vary in frequency from 590 Hz to 368 Hz as a fire truck approaches, passes…

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Q: 16. A police car has an 800-Hz siren. It is traveling at 35.0 m/s on a day when the speed of sound…

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Q: PLEASE ANSWER ASAP COMPLETE SOLUTION The source of a sound wave has a power of 5.45 μW. If it is a…

A: Given value--- power = 5.45 micro W. distance = 1.13 m. We have to find--- Intensity? Sound level…

Q: When plucked, a 1 m guitar string produces a sound wave with a fundamental frequency of 222 Hz.…

A: We have a guitar string of length L=1 m which produces a fundamental frequency (mode n=1) f=222 Hz.…

Q: A car blowing a 560-Hz horn moves at a speed of 15 m/s as it first approaches a stationary listener…

A:

Q: 30. For research purposes, a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse…

A: We know, speed of wave(v) = (wave length (λ))/(Time period (T)) or,  λ = vT

Q: Hair Dryer The decibel level of the sound from a certain hair dryer is measured at 70 dB. Find the…

A: The formula for the decibel level of a certain sound is  B=10 logII0 The decibel level (B) is 70 dB,…

Q: A cop car’s siren has a frequency of 750. Hz. If you are driving towards the cop’s siren at a speed…

A: Given:frequency, f = 750 Hzspeed, v = 20 m/sSpeed of sound, vs = 343 m/s Solution: Now, applying the…

Q: A concert loudspeaker suspended high off the ground emits 45 W of sound power. What is the sound…

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Q: You hear a noise with an intensity of 2.9 × 10-6 Watts/m2. Calculate the intensity in decibels. Use…

A: Given , Intensity of noise (I) = 2.9 x 10-6 Watts/m2 We want to calculate intensity in desibels

Q: Dolphins make sounds in air and water. What is the ratio of the wavelength of a sound in air to its…

A: The speed of sound of in air is

Q: A closed-end organ pipe is used to produce a mixture of sounds. The third and fifth harmonics in the…

A: