A plane harmonic sound wave of amplitude 15 mPa propagates in air (ρ= 1.2 kg/m3) at 21 °C, with a frequency of 549 Hz. Determine the intensity level associated with this wave and the maximum amplitude of the density wave
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- The wave functions for two harmonic waves are given by: y 1 (x,t)=(0.1 m) sin (1.0x - 4.0t) , y 2 (x,t)=(0.1 m) sin (1.0x - 4.0t + pi / 2) where x is in metres and t is in seconds . Write the wave function of the resultant wave when the two waves interfere. What is the amplitude of the resultant wave?A source emits sound waves isotropically. The intensity of the waves 2.50 m from the source is 1.91 x 10 -4 W/m2. Assuming that the energy is conserved, find the power of the source. See Section 9.15 Wave Intensity starting on page 32.A sound wave at 20° C has pressure amplitude of 2.00 Pa. The density of air is 1.2 Kg/m and the threshold for hearing intensity is 1012 w/m2. The speed of sound in air is 344 m/s. (a) Find the intensity of the sound wave. (b) Find the intensity in decibels.
- the wave functions for two harmonic waves are given by : y1(x,t)=(0.1m)sin(1.0x-3.0t), y2(x,t)=(0.1m)sin(1.0x-3.0t+π/2) where x is in metres and t is in seconds. write the wave function of the resultant wave when the two waves interfere. what is the amplitude of the resultant waveTwo progressive waves y1 (x, t) = A sin(4x – ot) and y2(x, t) = A sin(x – ot – ) travel in the same direction. Calculate the amplitude of the wave produced as a result of interference of these two waves. Take A = 5 cm, 1 = 4 m and w = 31.4 Hz. Provide your answer in centimeters.A sound wave having a frequency of 345 Hz travels through air at 20 °C. The decibel level at a distance of 16.3 m from the source is measured to be 86.5 dB. What is the maximum displacement of air molecules at that location? Assume the density of air is 1.20 kg/m³ and that the source produces spherical wave fronts. Express the displacement as a number having the units of mirco meters. 1 micro meter = 1 x 10-6 m. For example, If your calculated answer were 1.873 x 107 m, your entry would be the number 0.187
- A 38.0-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at 20.0°C is 1.20 kg/m3. Speed of sound in air at 20.0°C is 343 m/s. What is the displacement amplitude of a 38.0-Hz sound wave? What is the ratio of the displacement amplitude to the average distance between molecules in air at room temperature, about 3.00 nm?A sound wave having a frequency of 288 Hz travels through air at 20 °C. The decibel level at a distance of 33.5 m from the source is measured to be 76.8 dB. What is the dB level at a position that is 16.3 m closer? Assume the density of air is 1.20 kg/m³ and that the source produces spherical wave fronts. 82.59Problem 4. A point source emits sound waves uniformly in all directions. At distance 90.0 m from the source the sound intensity level is 15 dB. At what distance from the source is the sound intensity level 35 dB?
- A sound wave travels through air at 20 °C. The decibel level at a distance of 19.4 m from the source is measured to be 85.2 dB. What is the dB level at a position that is 7.17 m closer? Assume the density of air is 1.20 kg/m3 and that the source produces spherical wave fronts.Please asapA copper wire, whose cross-sectional area is 8.58 x 106 m², has a linear density of 6.18 x 103 kg/m and is strung between two walls. At the ambient temperature, a transverse wave travels with a speed of 60.8 m/s on this wire. The coefficient of linear expansion for copper is 17 x 10-6 (Cº)-1, and Young's modulus for copper is 1.1 x 10¹1 N/m². What will be the speed of the wave when the temperature is lowered by 26.5 Cº? Ignore any change in the linear density caused by the change in temperature. Number i Units