4. You are standing 4.0 m in front of a speaker, which is 3.0 m away from the other speaker on a line perpendicular to your line with the first speaker (see diagram below). They are playing a 688 Hz sinusoidal tone in phase. Assume the speed of sound is 344 m/s. Are you at a node, an antinode or some other point? Show a calculation that proves your point (hint: is a node a point of constructive or destructive interference?).
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- A plane is landing and reported having a decibel reading of 67 dB. 1. What is the intensity of the plane? 2. If the power of the noise at a distance of 9500 m above ground? 3. How much more intense is a drum set with 97 dß compared to the plane?You are standing 2.5 m directly in front of one of the two loudspeakers shown in the figure. They are 3.0 m apart and both are playing a 686 Hz tone in phase. (Figure 1) Figure 3.0 m 2.5 m Walk 1 of 1 Part A As you begin to walk directly away from the speaker, at what distances from the speaker do you hear a minimum sound intensity? The room temperature is 20 °C. Express your answer numerically using two significant figures. If there is more than one answer, enter your answers in ascending order separated by commas. ► View Available Hint(s) x = ΑΣΦ 17.68,5.62,2.98 Submit Previous Answers Request Answer Review X Incorrect; Try Again; 5 attempts remaining mPlease explain each step
- 4. You're singing in the shower and produce a beautiful middle C (frequency of 262 Hz). The speed of sound in the shower is 340 m/s and the standing wave produced has two nodes. What is the wavelength of this wave? * (1 Point) O 2.60 m 0.77 m O 1.30 m Pulses A and B moved toward one another. Which of the pulses below shows the resultan pulse formed when A and B overlap? *3. The measurement for sine wave of water, y displacement (water level) as function of time t (x-axis), is shown below. Find the period T based on the information in the Figure below. Calculate the frequency by f = 1/T (Hz). 4.The measurement for sine wave of water, y displacement (water level) as function of position x (horizontal axis), is shown below. Find the wavelength λbased on the information in the Figure below. Calculate the speed of wave using T from question 3 by ʋ = λ /T. Note: Required to show work.1. Two speakers are 4.5 meters apart, in phase, and produce a single sound wave with wavelength λ = 0.8m. Three points labelled A, B, and C are 4.0m, 8.0m, and 12.0m below the speaker on the left, as shown. Fill in the table with the required information, and indicate whether the point sees Constructive or Destructive interference. (Hint: remember the Pythagorean theorem!) 4.5m A B C AL= L2 14₁-121 www. L₁ L₂ AL 2 C/D SAT SHOZ! To yousupo 4m 4m 4m A B C Hint: Remember the Pythagorean Thorem: c² = a² + b² a b с
- Two identical point sources are generating waves with the same frequency and amplitude. The two sources are in phase with each other, so the two sources generate wave crests at the same instant. The wavelength of the waves is equal to the distance between the two sources. A. List all the labeled points where the waves from the two sources constructively interfere. If there are no such points, indicate that by stating "none". Separate each letter with a space. Hint: Determine the difference in the distance that each wave travels from the point sources. For example the difference between the distance travelled to B = 1.5λ - 0.5λ. Constructive interference occurs at ΔL=nλ. Destructive occurs at ΔL=nλ/2. B. List all the labeled points where the waves from the two sources destructively interfere. If there are no such points, indicate that by stating "none". Separate each letter with a space. Hint: Constructive occurs at ΔL=nλ. Destructive occurs at L=ΔL=nλ/2.1Which picture (A, B, or C) would best show the student listening to a high-pitched sound? Explain your reasoning. A B 1)E с
- 2Item 6 Learning Goal: To understand standing waves, including calculation of X and f, and to learn the physical meaning behind some musical terms. The columns in the figure (Figure 1) show the instantaneous shape of a vibrating guitar string drawn every 1 ms. The guitar string is 60 cm long. The left column shows the guitar string shape as a sinusoidal traveling wave passes through it. Notice that the shape is sinusoidal at all times and specific features, such as the crest indicated with the arrow, travel along the string to the right at a constant speed. The right column shows snapshots of the sinusoidal standing wave formed when this sinusoidal traveling wave passes through an identically shaped wave moving in the opposite direction on the same guitar string. The string is momentarily flat when the underlying traveling waves are exactly out of phase. The shape is sinusoidal with twice the original amplitude when the underlying waves are momentarily in phase. This pattern is called a…