Speed of Sound at a known temperature and density of air Altitude Temperature Speed of Sound Feet (ft) Meter (m) Celcius (°C) Kelvin (K) mph knots km/h m/s 0 (sea level) 0 (sea level) 15 288 761.1 661 1,225 340.3 5,000 1524 5.1 278 747.9 650 1,204 334.4 10,000 3048 |-4.8 268 734.5 638 1,182 328.4 15,000 4572 |-14.7 258 720.8 626 1,160 322.2 20,000 6096 |-24.6 248 706.9 614 1,138 316.0 25,000 7620 |-34.5 239 692.6 602 1,115 309.6 30,000 9144 -44.4 229 678.1 589 1,091 303.1 35,000 10668 |-56.0 217 660.7 574 1,063 295.4 40,000 12192 |-56.6 216 659.8 573 1,062 294.9 45,000 13716 |-56.6 216 659.8 573 1,062 294.9 50,000 15240 |-56.6 216 659.8 573 1,062 294.9 55,000 16764 |-56.6 216 659.8 573 1,062 294.9 60,000 18288 |-56.6 216 659.8 573 1,062 294.9

Q: The intensity (I) of a source of sound is 10 °Wm . I, = 10 -12 Wm . What is the sound level of 10…

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Q: The range of human hearing extends from 20 Hz to 20 kHz.  Find the wavelengths of these extremes, at…

A: We know:

Q: A sound of intensity I = 10-6 W/m2 falls on a detector of area A = 7 x 10-5 m2. (This is about the…

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Q: Discuss the propagation of sound wave in gases. How the energy is distributed in it.

A: Sound waves are propagated in gases in very fast manner. So there is no time for the wave to…

Q: A person standing 1.10 m from a portable speaker hears its sound at an intensity of 7.90 X 10^-3…

A: Given:Distance of person from speaker, d=1.10 mIntensity, I=7.90×10-3 W/m2

Q: Three identical aircraft produce a total sound level of 1.0×102dB when flying in formation. If each…

A: sound loudness due to three identical aircrafts (β) = 100 dB

Q: 22.0 m

A: Given, Speed of sound in air, vair = 343 m/s the horn is 1.2 m above the water surfaceTemperature of…

Q: A loudspeaker is placed near the open end of a pipe length 87 cm closed at its other end. Calculate…

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Q: In Quincke's experiment, the sound detected is changed from a maximum to a minimum when the sliding…

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Q: What are the longest and shortest wavelengths of sound that can be heard by a bat in air where the…

A: Bats use echolocation to navigate and hunt, emitting ultrasonic sounds and then analyzing the echoes…

Q: Find the number of decibels for the power of the sound given. Round to the nearest decibel. A…

A: Intensity of sound due to rocket engine (I) = 2.43×10-5 Wcm2

Q: A man builds a house with hollow blocks. What is the effect of the hollow blocks with respect to…

A: House is built with hollow blocks. We have to state the effect of it with respect to sound.

Q: What is the speed of sound at 72° F?

A: Given data *The given temperature is T = 72° F Convert degree-Fahrenheit to Celsius as Tc=T-32×59…

Q: Find the temperature at which the speed of sound in air is double its value at 0 degree C.

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Q: What is the wavelength of the waves you create in a swimming pool if you splash your hand at a rate…

A: Given Data: The frequency of the splashing a hand is, f=2.00 Hz The speed of the wave propagation…

Q: Find the ratio of the intensities of sound waves if one is 8 dB louder than the other.

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Q: A point source emit sound waves with an average power output of 80.0w. find the intensity of 3.00m…

A: The expression for intensity is I=P4πr2 Here, P is the power, I is the intensity.

Q: A piece of string 2.9 m long weighs 43.5 N. Find how fast a wave will travel on this string, if a…

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Q: How long will it take a sound to travel 2300 m in air with a temperature of 42 C?

A: The expression for Velocity relative to speed is, V = 331 + 0.6 T

Q: Two atmospheres made of the same gas gases have the following properties: P1 = 3P2 and 2ρ0(1) =…

A: Relation between pressures, P1 = 3P2 Density relationship, 2ρ0(1) = ρ0(2) Ratio, V2/V1 = ?

Q: A flat smooth surface will avoid the diffusion of sound energy in all directions. Select one: True O…

A: Step1 - Here we will understand the concept that will be used to solve the question. Reflection of…

Q: Calculate the speed of sound in a string that has a tension of 441 N and a linear mass density of…

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Q: Discuss the effect of density , pressure, temperature on the velocity of longitudinal waves in air.

A: Longitudinal waves are the kind of waves in which particles of wave vibrate parallelly to the…

Q: Two tuning forks of frequencies 320 HZ and 340 HZ produce sound waves whose wavelengths differ by 6…

A: To find- Velocity of sound in air=? Given- Frequency of first tuning fork (n1)=320 Hz Frequency of…

Q: The speed of sound in air at 0∘is: A) 331 m/s B) 330 m/s C) 330 ms D) 331 ms

A: The speed of sound varies with the temperature.  The speed of sound in air at 0 degree C is nearly…

Q: With what tension must a rope with length 3.20 m and mass 0.120 kg be stretched for transverse waves…

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Q: Calculate the frequency (in Hz) of the fundamental note emitted by an open pipe of length 1.4 m. The…

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Q: Calculate the length of a tube using sound wave measurements.

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Q: For transverse waves the oscillation is _____ to the direction of motion.

A: For transverse waves the oscillation is perpendicular to the direction of motion.

Q: A tube open at both the ends has length 47 cm and its inner diameter is 5 cm. If the velocity of…

A: Length of tube L = 47 cm = 0.47 m Velocity of sound in air v = 330 m/s Inner diameter of tube D = 5…

Q: The velocity of sound in air at room temperature is 350 m/s. Find the frequency of second overtone…

A: To find- Frequency of 2nd overtone in (1) pipe open at both ends. (2) pipe closed at one end. Given-…

Q: Compute the speed of sound of air when the air temperature is 40°C. Express your answer in km/s

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Q: The change in direction of sound waves caused by variation in its velocity from point to point , is…

A: Ques:

Q: Calculate the frequency (in Hz) of the 2nd overtone emitted by an open  pipe of length 1.5 m. The…

A: Given : An open pipe. Length, L = 1.5m Speed of sound in air, v = 343 m/s

Q: The sound wave propagating through air has a frequency of 1 kHz and a pressure wave amplitude of 10…

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Q: At what speed is an ambulance coming towards you if the actual and apparent frequencies are 10 and…

A: Actual Frequency, n= 10 HzApparent frequency , na= 12 HzSpeed of sound , v= 330 m/sobserver's speed,…

Q: Two open organ pipes of lengths 60cm and 60.5cm produce 2 beats per second. Calculate the velocity…

A: The frequency of the first organ pipe is,The frequency of the second organ pipe is,

Electromagnetic Waves

Electromagnetic waves are waves that consist of magnetic field and electric field components perpendicular to each other. These field components are also perpendicular to the direction of propagation of the wave.