A very loud train whistle has an acoustic power output of 100 W. If the sound energy spreads out spherically, what is the intensity level in dB at a distance of 100 meters from the train? (I0 = 10-12 W/m2) A.89.0 dB B. 78.3 dB C. 95.0 dB D. 81.6 dB

Q: Bats rely on sound localization to be able to fly during the night. On a cool 20∘C20∘C summer night,…

A: frequency (f) = 39 kHz speed of sound (v) = 340 m/s

Q: Problem 5. A typical adult ear has a surface area of 0.0021 m². The sound intensity during a normal…

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Q: A 72.0 dB sound wave strikes an eardrum whose area is 4.60*10^-5 m^2 . (i) What sound intensity (in…

A: (i) Write the formula for the sound intensity in dB.

Q: 5. You live on a busy street, but as a music lover, you want to reduce the traffic noise. (a) If you…

A: (a) Given: The intensity level reduced is 30 dB.

Q: A jet engine produces a sound level of 150 dB from a distance of 30 m (assuming spherical…

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Q: 6. An organ pipe with one open end and one closed end has a harmonic resonance frequency at 2988.0…

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Q: 9) What is the loudness, in decibels, of a sound 16 trillion times as loud as the softest audible…

A: Given data: I=16 trillion times of sound I=16×1012I0

Q: 4. (a) What is the sound intensity for a sound source with a sound intensity level (IL) of 120 dB?…

A: Part A. Intensity level = Say intensity of sound is I. The relation between the intensity level and…

Q: (I) What is the intensity of a sound at the pain level of120 dB? Compare it to that of a whisper at…

A: Given: Pain level = 120 dB Level of whisper = 20 dB

Q: Consider a diagnostic ultrasound of frequency 5.00 MHz that is used to examine an irregularity in…

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Q: Problem 6. The low-frequency speaker of a stereo set has a surface area of 0.05 m² and produces 1 W…

A: Given: A=0.05 m2P=1 W

Q: 2. A stretched string has a line density of 0.0064 kg/m, tension of 1082 N, and sounds the note D4.…

A: Given, Linear density of string,μ = 0.0064 kg/m Tension , T = 1082 N Sounds the note D4 Frequency of…

Q: Two people are talking at a distance of 3.4 m from where you are, and you measure the sound…

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Q: The crest of a Parasaurolophus dinosaur skull contains a nasal passage in the shape of a long, bent…

A: Part A. Length = L = 2.11 m speed of sound = v = 343 m/s Frequency of a tube open at both ends will…

Q: A stereo speaker produces a pure tone with a frequency of 250 Hz. (a) What is the period of the…

A: given, frequency of speaker = 250 hz Vsound in air = 340 m/s Vsound in water = 1500 m/s

Q: Diagnostic ultrasound of frequency 3.74 MHz is used to examine tumors in soft tissue. (a) What is…

A: (a) Write the expression for the relation between the wavelength, speed and frequency, and solve for…

Q: 10 m from a speaker sound intensity level 60 dB.  (a) What is the power of the speaker? (b) What is…

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Q: Q2. A wave on a string is described by y(x,t) = 15.0 sin(Tx/8 - 4rt) where x and y are in centimeter…

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Q: 7. What is the lowest frequency (excluding the fundamental) at which standing wave can occur in a…

A: Given data: Length (L) = 0.90 m Pipe opens at both ends Speed of sound (v) = 339 m/s Required:…

Q: A family ice show is held at an enclosed arena. The skaters perform to music with level 87.0 dB.…

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Q: A 60 man choir sings with the sound intensity of 70 dB in a 12 m distance from the choir. a) What is…

A: Given information: Here, β is the sound level at r1 distance, r2 is the distance at which the…

Q: The faintest sound the human ear can detect at frequency 1kHz corresponds to an intensity of about…

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Q: 1. What is the intensity in watts per meter squared of 85.5 dB sound? W 1= m²

A: The intensity of sound in dB is expressed as I in dB=10 logII0I0=1.0×10-12 W/m2 is intensity of…

Q: 31. IE. A dog's bark has a sound intensity level of 40 dB. (a) If two of the same dogs were barking,…

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Q: 6. An organ pipe is 128 cm long. What is the second audible harmonic if the pipe is open at both…

A: Given data: Length (L) = 128 cm = 1.28 m Speed of sound in air (v) = 339 m/s Required: Frequency of…

Q: 21) What is the intensity level in decibels of a sound with intensity 10-4 W/m2? The threshold of…

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Q: 1. A long pipe is closed at one end and open at the other. If the fundamental frequency of this pipe…

A: As per our company guidelines, we are supposed to do only one question at a time. Please post other…

Q: 95 The sound intensity is 0.0080 W/m² at a distance of 10 m from an isotropic point source of sound.…

A: Intensity of sound at a distance of 10 m from an isotropic point source of sound = I1I1 = 0.008 Wm2…

Q: A person standing 1.15 m from a portable speaker hears its sound at an intensity of 4,30 × 10 ³…

A: The sound intensity level β (in decibels) of a sound having an intensity I in watts per meter…

Q: The sound level at 1.0 m from a certain talking person talking is 60 dB.  A.How far will you have to…

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Q: A family ice show is held at an enclosed arena. The skaters perform to music with level 75.0 dB.…

A: Given data: Skaters sound level = 75 dB Baby sound = 70 dB Need to determine the total sound…

Q: Q4. During an extremely loud sound the amplitude of the pressure in the sound wave in air is 1.0 kPa…

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Q: Fortunately we cannot hear the ultrasound, because the sound intensity can be very high, up to 671…

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Q: 56. Suppose that a public address system emits sound uniformly in alldirections and that there are…

A: Distance from the sound source, r=22 m Intensity of the sound at distance r=22 m is I=3.0×10-4W/m2…

Q: The source of a sound wave has a power of 2.10 uW. Assume it is a point source. (a) What is the…

A: Answer:-  Given  Power of a sound wave(P) = 2.10 uw  = 2.10 × 10-6 w  (a) distance (r) = 3.10 m  We…

Q: Dolphins can hear ultrasound with frequencies up to 280 kHz. a) What is the speed of sound in water…

A: Given, Frequency 2.8x105 Hz wavelength 0.510cm=0.510x10-2m

Q: Can you explain please

A: The relation between sound intensity level ‘L’ in decibels and the intensity of ultrasound is given…

Q: 10. If the intensity for 5 bugs is 6 x 10-12 W/m² then what is the intensity for 1 bug? For 3 bugs?…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The softest sound a human ear can hear is at 0 dB (Io = 10-12 W/m2). Sounds above 130 dB cause pain.…

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Q: What would be the sound level (in dB) of a sound wave in air that corresponds to a displacement…

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Q: A family ice show is held at an enclosed arena. The skaters perform to music with level 80.0 dB.…

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Q: P6. Calculate the factor by which the intensity of a sound wave increases if the sound level…

A: We need to calculate the factor by which we should increase the intensity of sound in order to…

Q: 9. A steel piano wire is 70.0 cm long and has a mass of 2.90 g. If the tension of the wire is 590 N,…

A: Data Given ,  Length of the wire ( L ) = 70 cm = 0.7 m Mass of the wire ( m ) = 2.90 g.…

Q: A sound registers (2.40x10^1) decibels on a detector. What is the intensity in W/m2? Assume the…

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Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.