Organ pipes, open at one end, resonate best at their first resonant length. Two pipes have length 23 cm and 30 cm respectively. a) What is the wavelength of the sound emitted by each pipe? b) What are the respective frequencies if the speed of sound is 341 m/s. c) What is the air temperature in this church?

4) A factory uses 12 metal stamping machines. When all machines are operating, they produce a souna level of 103 dB. a) What is the intensity of the sound produced by all 12 machines? 3 of the machines are down for maintenance. b) What is the intensity of the remaining machines? c) What is the sound level that is produced by the remaining machines? dB d) What is the intensif produced by I machine? 1₁ = W/m² e) What is the sound level that is produced by I machine? dB

A harpsichord string of length 1.50 m and linear mass density 25.0 mg/m vibrates at a fundamental frequency of 447.0 Hz. A) What is the speed of the transverse string waves? in m/s B) What is the tension? in N  C) What is the wavelength of the sound wave in air produced by the vibration of the string? (The speed of sound in air at room temperature is 343 m/s.) in m D)  What is the frequency of the sound wave in air produced by the vibration of the string? (The speed of sound in air at room temperature is 343 m/s. in Hz

A room is at standard 20 cels. a) What wavelength does a 1.11 million Hz ultrasound passes through human tissue? Be sure to use the speed of these waves in human tissue (1540m/s). b) How many waves are passing through the human tissue in 1 second? c) The ultrasound session lasts 5 minutes. How many waves passed through the human tissue during this timeframe? d) Which example best describes this type of wave -- water, light, spring, sonic boom, pulse, pulse wave packet? Explain your answer.

O Attempt 4 Bats rely on sound localization to be able to fly during the night. On a cool 20°C summer night, a bat produces an ultrasonic sound with a frequency of 35 kHz. The speed of sound in air at 20°C is 340 m/s. What is the wavelength 1 of this ultrasound, in meters? %3D .01 m While remaining stationary, the bat emits a sound pulse and receives an echo after 0.150 s. How far away, in meters, is the reflecting object from the bat?

An organ pipe has a length of 2.45m and is open at both ends. Determine the fundamental frequency and draw what the standing wave pattern for this frequency looks like.

Urgent please! A firecracker produces a power of 2.5x10-3 mw.a. What is the intensity of a firecracker at a distance of 3.00 m from thefirecracker?b. How many firecrackers would be required to produce a sound level of 120db at a distance of 5.00 m from the firecrackers?

Two adjacent natural frequencies of an organ pipe are determined to be 870 Hz and 986 Hz. (Assume the speed of sound is 343 m/s.) (a) Calculate the fundamental frequency of this pipe. Hz (b) Calculate the length of this pipe. m

1. The low-frequency speaker of a stereo set has a surface area of 0.05 m and produces 1 W of acoustical power. (a) What is the intensity at the speaker? (b) If the speaker projects sound uniformly in all directions, at what distance from the speaker is the W intensity 0.26 -? m2 Hint: If the sound projects uniformly in all directions, after traveling a distance r it is uniformly distributed over a sphere of area r. What is the surface area of a sphere of radius r? W (a) Intensity: m? (b) Distance (radius), r: m

The following overall sound pressure levels are measured from individual items of plant at the same location: 63 dB, 65 dB, 58 dB, 43 dB. Calculate the cumulative sound pressure level if all items of plant were to operate simultaneously:a. 64.0dBb. 67.6 dBc. 67.0 dBd. 135.3 dB