The figure shows the output from a pressure monitor mounted at a point along the path taken by a sound wave of a single frequency traveling at 346 m/s through air with a uniform density of 2.11 kg/m3. The vertical axis scale is set by Aps = 4.20 mPa. If the displacement function of the wave is written as s(x, t) = Sm cos(kx - wt), what are (a) sm, (b) k, and (c) w? The air is then cooled so that its density is 2.15 kg/m3 and the speed of a sound wave through it is 320 m/s. The sound source again emits the sound wave at the same frequency and same pressure amplitude. What now are (d) sm, (e) k, and (f) w? Ap (mPa) Aps 2.10 -Ap, t (ms) (a) Number Units nm (b) Number 8.65 Units (c) Number Units rad/s (d) Number Units nm (e) Number Units (f) Number Units rad/s

The figure shows the output from a pressure monitor mounted at a point along the path taken by a sound wave of a single frequency traveling at 346 m/s through air with a uniform density of 2.11 kg/m3. The vertical axis scale is set by Aps = 4.20 mPa. If the displacement function of the wave is written as s(x, t) = Sm cos(kx - wt), what are (a) sm, (b) k, and (c) w? The air is then cooled so that its density is 2.15 kg/m3 and the speed of a sound wave through it is 320 m/s. The sound source again emits the sound wave at the same frequency and same pressure amplitude. What now are (d) sm, (e) k, and (f) w? Ap (mPa) Aps 2.10 -Ap, t (ms) (a) Number Units nm (b) Number 8.65 Units (c) Number Units rad/s (d) Number Units nm (e) Number Units (f) Number Units rad/s

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Please asap
Loudness (L), in decibles (dB), of a sound of intensity I is defined to be L=10log( I/I0), where I0=10-12(W/M2) (watts per meter square) is the minimum intensity detectable by the human ear. A.) Find the loudness L, in decibles (dB), of a trombone given the intensity is 1010I0 B.) Find the intensity of a rock concert whose loudness is 115 decibles. C.) What is the NIOSH recommended Exposure Limit (REL) given in dB based on exposures at work 5 days per week?
A progressive wave travelling in the x-direction is represented by the following equation: y = Asin(Bt - Cx). Given that parameters A, B and Care given in Sl units calculate the velocity of the wave for A = 50, B = 2694 and C = 21.
A cyclist is using a loudspeaker to measure her speed. She cycles directly towards the loudspeaker which emits a sound with a constant frequency 261 Hz. The cyclist measures the frequency to be 269 Hz. You should assume that the speed of sound in air is 335 m s-¹. (a) Calculate the speed of the cyclist. (b) Describe briefly what the cyclist will hear as she passes the loudspeaker.
The loudness of sound can be measured on a decibel scale. The sound level L (in decibels) of a sound is given by 0-12 W/m². The L=10 log where I is the intensity of the sound (in watts per square meter, W/m²) and I = 10 1 intensity, I, of a whisper is 10-10 W/m². Find the decibel value of this sound. The decibel value of this sound is. (Simplify your answer. Type an integer or a fraction.) GEREID
There was an accident and NASA engineers are trying to sort out where two of their Mars Rovers (named 'Tango' and 'Foxtrot') have landed. The engineers know that landing site A is much hotter than landing site B. Unfortunately, the only working sensors on Tango and Foxtrot measure the speed of sound. If Tango measures the speed of sound at its landing site as 240 m/s, while Foxtrot measures speed of sound as 258 m/s at its landing site, where has each rover landed? Tango landed at site A while Foxtrot landed at site B. Tango landed at site B while Foxtrot landed at site A. Both Tango and Foxtrot landed at site A. O Both Tango and Foxtrot landed at site B.
Q# 02 As a certain sound wave travels through the air, it produces pressure variations (above and below atmo- spheric pressure) given by AP = 1.27 sin (7x - 3407t) in SI units. Find (a) the amplitude of the pressure vari- ations, (b) the frequency, (c) the wavelength in air, and (d) the speed of the sound wave.
Problem 2: One day when the speed of sound in air is 343 m/s, a fire truck traveling at v, = 29 m/s has a siren which produces a frequency of f = 405 Hz. Randomized Variables Vs = 29 m/s f= 405 Hz Part (a) What frequency (in Hertz) does the driver of the truck hear? fa= sin() cos() tan() 7 8 9 HOME cotan() asin() acos() E 4 5 atan() acotan() sinh() 1 3 cosh() ODegrees O Radians tanh() cotanh() + END Vol BACKSPACE CLEAR Submit Feedback I give up! Hint Part (b) What frequency (in Hertz) does an observer hear when the truck is moving away?
We will assume that a sound wave, once generated and emitted, will propagate uniformly in all directions of 3-dimensional space. Find an expression for the displacement s(r, t) of the air particles from equilibrium, where r is the radial distance from the source, and t is time. Introduce physical constants/coefficients, with appropriate physical dimensions, when necessary.
The function y(x, t) = A cos(kx - wt) describes a traveling wave on a taut string with the x-axis parallel to the string. If the wavelength of the wave λ = 0.8 m and w = 17.1л/s, what is the speed of the traveling wave? Express your answer in m/s, to at least one digit after the decimal point.
Problem #3: What intensity level dB in does a sound of 3. 04 × 10–4 W/m2 correspond to?
Find the pressure amplitude (in Pa) of a 1.40 kHz sound wave in air, given that the displacement amplitude is 2.30 x 10-8 m. [Note: The equilibrium density of air is p pressure, 1.013 × 105 Pa.] 8.32 Use the relationship between s max and ΔΡ 1.20 kg/m³ and the speed of sound in air is v = 343 m/s. Pressure variations AP are measured relative to atmospheric max' You will need to convert frequency to angular frequency. Don't forget to convert units as needed. Pa