Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 23, Problem 35SP
Compute the molecular mass M of a gas for which
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Calculate the speed of sound v in air using the formula v = √γRT/M, where γ = 1.4, R=8.315 J/mol·K , M = 28.8x10-3Kg/mol and T is the room temperature in Kelvin. (T=25.5 Celsius)
A monatomic ideal gas ( = 1.67) is contained within a box whose volume and pressure are 2.8 m3 and 2.7 × 105 Pa, respectively. The total mass of the gas is 3.0 kg. Find the speed of sound in the gas.
Calculate the time taken by a sound wave of frequency 800 Hz and wavelength 44 cm to travel a distance of 500 m. What would be the atmospheric temperature in dry air in this situation? How about the atmospheric (air) bulk modulus Bair ? Given : Density of air (ρair) = 1.92 kg/m3.
Chapter 23 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 23 - 22. Three seconds after a gun is fired, the person...Ch. 23 - 23. What is the speed of sound in air when the air...Ch. 23 - 24. A longitudinal wave with a frequency of 100 Hz...Ch. 23 - 25. If the speed of sound in air is found to be...Ch. 23 - 26. An autofocusing camera sends out a pulse of...Ch. 23 - 27. It’s often claimed that for every second of...Ch. 23 - 28. A shell fired at a target 800 m away was heard...Ch. 23 - 29. In an experiment to determine the speed of...Ch. 23 - 23.30 [II] A disk has 40 holes around its...Ch. 23 - 23.31 [I] The bulk modulus of seawater is 2.1 GPa....
Ch. 23 - 32. Use Eq. (23.2) to determine the approximate...Ch. 23 - 33. Compute the speed of sound in helium gas at...Ch. 23 - 23.34 [II] Determine the speed of sound in carbon...Ch. 23 - 23.35 [II] Compute the molecular mass M of a gas...Ch. 23 - 23.36 [II] At S.T.P., the speed of sound in air is...Ch. 23 - Prob. 37SPCh. 23 - 23.38 [II] A bar of dimensions and mass 2.00 kg...Ch. 23 - 39. Find the speed of compression waves in a metal...Ch. 23 - Prob. 40SPCh. 23 - 23.41 [I] The level of normal speech exchanged...Ch. 23 - 42. The threshold of human hearing is an intensity...Ch. 23 - 23.43 [II] A machine produces a sound level of 80...Ch. 23 - 44. Suppose the intensity of sound increases by a...Ch. 23 - 45. If the intensity level of sound is to be...Ch. 23 - 46. Suppose we add ±3.0 dB to the intensity level...Ch. 23 - 23.47 [I] If the intensity of sound changes, the...Ch. 23 - 23.48 [I] Redo Problem 23.45 using Eq. (23.9).
Ch. 23 - 49. A sound has an intensity of 5.0 × 10−7 W/m2....Ch. 23 - 50. A person riding a power mower may be subjected...Ch. 23 - 23.51 [II] A rock band might easily produce a...Ch. 23 - 23.52 [II] A whisper has an intensity level of...Ch. 23 - 23.53 [II] What sound intensity is 3.0 dB louder...Ch. 23 - 23.54 [II] Calculate the intensity of a sound wave...Ch. 23 - 23.55 [II] What is the amplitude of vibration in a...Ch. 23 - 23.56 [II] One sound has an intensity level of...Ch. 23 - 23.57 [II] An organ pipe is tuned to emit a...Ch. 23 - 23.58 [I] A locomotive moving at 30.0 m/s...Ch. 23 - 23.59 [II] Two cars are heading straight at each...Ch. 23 - 23.60 [II] To determine the speed of a harmonic...Ch. 23 - 23.62 [II] The two sources shown in Fig. 23-4 emit...
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- A sound wave in air has a pressure amplitude equal to 4.00 103 Pa. Calculate the displacement amplitude of the wave at a frequency of 10.0 kHz.arrow_forwardAt what temperature would the speed of sound in oxygen be same as that in hydrogen at 27 degree C . Given that at 0 degree C , their densities are in the ratio 8:1.arrow_forwardThe coldest and hottest temperatures ever recorded in Cuba are 33.1 degrees Fahrenheight (312 K), respectively, What is the speed of sound in air (in m/s) at each temperature? (a) speed of sound at 33.1 degrees Fahrenheight (m/s) (b) speed of sound at 101.8 degrees Fahrenheight (m/s)arrow_forward
- Calculate the speed of sound in oxygen from the following data. The mass of 22.4 liter of oxygen at STP (T = 273 K and p = 1.0×105 N m-2 ) is 32 g, the molar heat capacity of oxygen at constant volume is Cv = 2.5 R and that at constant pressure is Cp = 3.5 R.arrow_forwardAt what temperature is the speed of sound in helium (ideal gas, = 1.67, atomic mass = 4.003 u) the same as its speed in oxygen gas at 5.40 oC? The speed of sound in oxygen at 5.40°C is 318 m/s.arrow_forwardWhat is the ratio of the velocity of sounds in helium gas to that in air at the same pressure and temperature? (Specific heat of helium is 1.66, molar mass of air is 0.029 kg/mol, molar mass of helium is 0.004 kg/mol)arrow_forward
- How long will it take a sound to travel 2300 m in air with a temperature of 42 C?arrow_forwardCalculate the acoustic sound intensity level in decibels for a sound wave travelling in air at 10 degree C and having a pressure amplitude of 0.656 Pa.arrow_forwardCalculate the pressure amplitude (in m) of a 45 kHz sound wave in pure hydrogen if it has adisplacement amplitude of 1.5 mm. (ρH2 = 0.08 kg/m3, v = 1286 m/s.)arrow_forward
- If the speed of sound through hydrogen is 1280m/s, what will be the speed of sound through a mixture of 4 parts by volume of hydrogen and 1 part of oxygen?arrow_forwardA sound wave propagating in air has a frequency of (7.86) kHz Calculate the change in wavelength when the wave, initially traveling in a region where T = (27.35}°C, enters a region where T = (5.99)°C.arrow_forwardWhat is the speed of sound, in the unit of m/s, in a medium that has density of ρ = 792 kg/m3 and bulk modulus of B = 823 MPa?arrow_forward
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