A speaker is placed at the end of a resonant tube. One end is closed and one end is open. The picture shows three lengths where the sound gets noticeably louder. The first standing wave mode is shown. Sketch the second and third standing wave modes. (For the first mode, our sketch tells us that L1= λ/4)

Consider a 1 meter-long string with a mass of 50 g attached to a string vibrator. The tension in the string is 80 N. When the string vibrator is turned on, it oscillates with a frequency of 64 Hz and produces a sinusoidal wave on the string with an amplitude of 4 cm and a constant wave speed. Give your answers to 3 sig fig. A)VWhat is the linear density of the medium?____kg/m B)What is the wave speed?____m/s C)What is the angular frequency?______Hz  D) What is the time-averaged power supplied to the wave by the string vibrator?___W

What is the length of a string that has a standing wave with four nodes (including those at the ends) and λ = 24 cm?

The following graph shows the superposition of two identical sound waves that are out of phase. Sketch the resulting sound wave on the graph and identify the type of interference. What does this mean for the listener hearing these two waves simultaneously? mo 2.38 3.30 A

Problem 1: The figure below shows four identical point sources of sound that are uniformly spaced on an x-axis. Sq d- d S3 d S4 P The sources emit sound at the same wavelength X and same amplitude A, and they emit in phase. A point P is shown on the x axis. Assume that as the sound waves travel to P, the decrease in their amplitude is negligible. What multiple of A is the amplitude of the net wave at P if distance d in the figure is (a) X/4, (b) A/2, and (c) X?

0.0058 kg/m is fixed at both ends. A 5.0-kg mass is hung from A string with a linear mass density of the string, as shown. If a pulse is sent along section A, what is the wave speed in section A and the wave speed in section B? %D B. A FA 35° 5 kg Image Description VA m/s VB = m/s B.

The figure below shows the maximum displacement for a standing wave pattern. The earliest time between the two flashes (the solid and the dotted lines) is 0.025 s. The wave functions for the two waves that interfere to produce the standing wave pattern shown in the figure are: t=0 t= 0.025 s 0.5 m O y_1 (x,t)=2mm sin(4Tx-20nt) and y_2 (x,t)=2mm sin(4Ttx+20nt) O y-1 (x,t)=2mm sin(2rtx-40nt) and y_2 (x,t)=2mm sin(2X+40nt) O y-1 (x,t)=1mm sin(2rtx-20nt) and y_2 (x,t)=1mm sin(2x+20t) O y_1 (x,t)=1mm sin(2nx-40nt) and y_2 (x,t)=1mm sin(2nx+40rt)

Chapter 17, Problem 020 The figure shows four isotropic point sources of sound that are uniformly spaced on an x axis. The sources emit sound at the same wavelength and same amplitude sm, and they emit in phase. A point P is shown on the x axis. Assume that as the sound waves travel to P, the decrease in their amplitude is negligible. What multiple of sm is the amplitude of the net wave at P if distance d in the figure is (a)1A, (b)2, and (c)4/? (a) Number (b) Number (c) Number Units Units Units S₁ Sa Sa + S₁

A row of seats is parallel to a stage at a distance of 8.4 m from it. At the center and front of the stage is a diffraction horn loudspeaker. This speaker sends out its sound through an opening that is like a small doorway with a width D of 0.074 m. The speaker is playing a tone that has a frequency of 2.00 104 Hz. The speed of sound is 343 m/s. What is the distance between two seats, located near the center of the row, at which the tone cannot be heard?

A wave is modeled by the wave function: y (x, t) = A sin [ 2π/0.1 m (x - 12 m/s*t)] 1. Find the wavelength, wave number, wave velocity, period and wave frequency. 2. Construct on the computer, in the same graph, the dependence of y (x, t) from x on t = 0 and t = 5 s in case the value of amplitude A corresponds to the first letter of your name: letter E A. A=0.1 mB. A=0.15 mC. A=0.2 mÇ. A=0.25 mD. A=0.3 mDh. A=0.35 mE. A=0.4 mË. A=0.45 mF. A=0.5 m G. A=0.55 mGj. A=0.6 mH. A=0.65 mI. A=0.7 mJ. A=0.75 mK. A=0.8 mL. A=0.85 mLl. A=0.9 mM. A=0.95 m N. A=1.05 mNj. A= 1.1 mO. A=1.15 mP. A=1.2 mQ. A=1.25 mR. A=1.3 mRr. A=1.35 mS. A=1.4 mSh. A=1.45 m T. A=1.5 mTh. A=1.55 mU. A=1.6 mV. A=1.65 mX. A=1.7 mXh. A=1.75 mY. A=1.8 mZ. A=1.85 mZh. A=1.9 m 3. After constructing the graph, make the appropriate interpretations and comments from the result that you got graphically. 4. How much is the wave displaced during the time interval from t = 0 to t = 5 s? Does it match this with the graph results?…