What frequencies, in terms of the fundamental frequency of the original pipe in Part A, can you create when blowing air into the pipe that has a hole halfway down its length? ▸ View Available Hint(s) Submit Part E Only the odd multiples of the fundamental frequency Only the even multiples of the fundamental frequency All integer multiples of the fundamental frequency What length of open-closed pipe would you need to achieve the same fundamental frequency f as the open-open pipe discussed in Part A? ▸ View Available Hint(s) Half the length of the open-open pipe OTwice the length of the open-open pipe One-fourth the length of the open-open pipe Part F Four times the length of the open-open pipe The same as the length of the open-open pipe Submit What is the frequency f" of the first possible harmonic after the fundamental frequency in the open-closed pipe described in Part E? Express your answer in hertz. ▸ View Available Hint(s) (? Hz

WT-2 A pipe closed at one end and open at the other has a length of 0.750m. Jiatai places a speaker producing a low sound frequency above the open end of the tube. He then increases the frequency slowly. The pipe is in air at sea level. a) Draw the possible standing wave patterns for the sound waves in the tube starting with the lowest frequency. lowest frequency fa fo fa highest open end L=0.750m closed end L=D L= 2 b) Below each pattern write the tube-length-to-wavelength relationship for each pattern. c) Write the general symbolic relationship for the frequency of the n" harmonic, fn. Specify the possible values for n. d) Put the known information into your equation and find the numerical value of the frequencies fa, f, fes and fg. e) Jiatai can hear frequencies up to 19,980HZ. What is the highest frequency of the highest harmonic that Jiatai can hear from this tube and what is the harmonic number n of that harmonic?

Consider two pipes of identical lengthone open at one end and one open at both ends. Select the correct statement below that describes the fundamental frequency of a sound wave in air in each pipe. a. The value of the fundamental frequency is the same for both pipes. b The value of the fundamental frequency is lower for the pipe closed at one end. C The value of the fundamental frequency is lower for the open pipe.

The fundamental frequency of a pipe that is open at both ends is 524 Hz. ▼ Part A How long is this pipe? Express your answer with the appropriate units. L = Submit Part B λ= Submit Part C μA Value If one end is now closed, find the wavelength of the new fundamental. Express your answer with the appropriate units. f= U Request Answer μА Value Request Answer Units "μA Value Units If one end is now closed, find the frequency of the new fundamental. Express your answer with the appropriate units. ? Units ? ?

Part A Two steel guitar strings have the same length. String A has a diameter of 0.60 mm and is under 430.0 N of tension. String B has a diameter of 1.5 mm and is under a tension of 850.0 N . You may want to review (Pages 461 - 463) . Find the ratio of the wave speeds, vA/VB, in these two strings. Express your answer using two significant figures. Hνα ΑΣφ VA/VB = Submit Request Answer

If the fundamental frequency of a tube is 784 Hz, and the speed of sound is 343 m/s, determine the length of the tube (in m) for each of the following cases.   1. the tube is closed at one end 2. the tube closed at both ends

WT-2 A pipe closed at one end and open at the other has a length of 0.750m. Jiatai places a speaker producing a low sound frequency above the open end of the tube. He then increases the frequency slowly. The pipe is in air at sea level. a) Draw the possible standing wave patterns for the sound waves in the tube starting with the lowest frequency. lowest frequency fa fo fa highest open end L=0.750m closed end L%3D L= L= b) Below each pattern write the tube-length-to-wavelength relationship for each pattern. c) Write the general symbolic relationship for the frequency of the n" harmonic, fn. Specify the possible values for n. d) Put the known information into your equation and find the numerical value of the frequencies fa, f, fe, and få. e) Jiatai can hear frequencies up to 19,980HZ. What is the highest frequency of the highest harmonic that Jiatai can hear from this tube and what is the harmonic number n of that harmonic? Answers WT-1 a) L=/4, L=32J4, L=52/4, L=7/4 b) 0.166m WT-2 a)---…

In an acoustics lab you have a 120 m long pipe containing very cold air.  Suppose that using a speaker you cause a sinusoidal wave of sound with frequency 150 Hz and wavelength 1.9 m to travel down the pipe. i)How long does it take for your sinusoidal wave to travel from one end of the pipe to the other end of the pipe? ii)What is the temperature of the air in the pipe?

Consider a pipe that is closed at one end. Sketch the standing wave pattern in each of the following situations to show the regions of greatest and least air pressure variations (pressure antinodes and nodes, which are different from displacement antinodes and nodes). Then formulate equations that relate the wavelength å and frequency f to the length L of the pipe. a) Tube with both ends open (“open tube"): fundamental. 2 = b) Tube with both ends open (“open tube"): first overtone (2nd harmonic). aー c) Find the ratio between fundamental and first overtone frequencies: f/f = d) Tube with one open end (“closed tube"): fundamental. e) Tube with one open end (“closed tube"): first overtone (3rd harmonic). f3 = f) Find the ratio of the first overtone and fundamental frequencies: /f =

A loudspeaker on a pole at the same height as your ears is radiating 100 W of sound energy in all directions. You are walking directly toward the speaker at 0.60 m/s. Assume your ears are 20 m away from the loudspeaker itself and, although it is not realistic, ignore all reflections of sound from nearby objects such as the ground. What is the sound intensity level at the location of your ears? Express your answer with dB units. ► View Available Hint(s) B Submit Part B dß dt = Submit μÀ || Value What is the rate (dB/s) at which the sound intensity level is increasing? Hint: Use the chain rule and the relationship log₁0 x = ln x/ ln 10. Express your answer in decibels per second. ► View Available Hint(s) Units VE ΑΣΦ www ? ? dB/s