10. A sound is transmitted through air (density 1.20 kg/m2) at a velocity of 345 m/s...
The acoustic impedance of air:Zair=410kg/m2s. A sound wave propagates in air. 0.2% of the sound transmitted into an unknown material. the density of the unknown material is 3×10 to the power 3 kg/me. calculate the speed of sound in the unknown material in the unit of m/s.
A sound wave has an intensity level of 123.5 dB in air. The density of air at 20.0°C is ρ = 1.20 kg/m3. The speed of sound in air at 20.0°C is v = 343 m/s What is the pressure amplitude of the wave? in N/m2
A sound wave a frequency of 20 kHz emerges through a circular opening that has a diameter of 0.78 m. Concepts: The diffraction angle for a wave emerging through a circular opening is given by sin(theta) = 1.22 /D, where is the wavelength of the sound and D is the diameter of the opening. What is meant by the diffraction angle? the angle that the sound wave bends away from the center before passing through the opening the location of...
The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20∘C. At a distance of 4.98 m from the trumpet the sound intensity level is 56.0 dB. The frequency is 586 Hz. Use 344 m/s for the speed of sound in air, 1.20 kg/m3 for the density of air, and 1.00×10−12 W/m2 for the reference intensity. a) What is the pressure amplitude at this distance? b) What is the displacement amplitude? Use 1.42×105 Pa...
Sound travels through air at 343 m/s, and through fresh water at
1482 m/s. A kid jumps into a lake, which makes a sound wave in air
and in water. After 2.25 seconds, how much farther has the sound
wave traveler in water than in air?
Sound travels through air at 343 m/s and through fresh water at 1482 m/s. A kid jumps into a lake, which makes a sound wave in air and in water. After 2.25 s, how...
The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20∘C. At a distance of 4.90 m from the trumpet the sound intensity level is 49.0 dB . The frequency is 584 Hz . Part A What is the pressure amplitude at this distance? Use 344 m/s for the speed of sound in air, 1.20 kg/m3 for the density of air, and 1.00×10−12 W/m2 for the reference intensity. Part B What is the displacement...
I'm not sure how to solve for these materials, could I get help
with parts a,b,c,d
13) In the clinical use of ultrasound, a thin layer of gel is put on the skin before the device that emits and receives the reflected sound waves-- the transducer--is placed on the skin This transducer is usually made of a ceramic, barium titanate, which has a density of 5600 kg/m' and through which sound waves travel at 5500 m/s. a) Calculate the values...
A 33 kHz sound wave travels in air at v=355 m/s; what is the temperature of the air through which it travels? b) What is its velocity and wavelength? c) Two sound waves arrive at an observer; one is -30 dB quieter than the other which is at 1000 mW/m2. What is the intensity of the quieter one in mW/m2?
A sound wave in water has an intensity of 1*10^-3 W/m^2. The density of water is 1000 kg/m^3 and the speed of sound in water is 1482m/s. What is the pressure amplitude of the sound wave?
3. A sound traveling in air has a velocity of 340 m/s and a frequency of 200 Hz. What is its wavelength? What would be the wavelength if the frequency was (a) 2, (b) six times as great? If the sound travels at three times the velocity in a denser medium while the frequency remains the same, what are the wavelengths in each of the preceding cases?