PRACTICE IT Use the worked example above to help you solve this problem. A certain piano string is supposed to vibrate at a frequency of 4.36 x 10² Hz. In order to check its frequency, a tuning fork known to vibrate at a frequency of 4.36 x 10² Hz is sounded at the same time the piano key is struck, and a beat frequency of 8 beats per second is heard. (a) Find the two possible frequencies at which the string could be vibrating. flower = fhigher = Hz Hz (b) Suppose the piano tuner runs toward the piano, holding the vibrating tuning fork while his assistant plays the note, which is at 428 Hz. At his maximum speed, the piano tuner notices the beat frequency drops from 8 Hz to 4 Hz (without going through a beat frequency of zero). How fast is he moving? Use a speed of sound of 343 m/s. m/s (c) While the piano tuner is running, what beat frequency is observed by the assistant? [Note:

PRACTICE IT Use the worked example above to help you solve this problem. A certain piano string is supposed to vibrate at a frequency of 4.36 x 10² Hz. In order to check its frequency, a tuning fork known to vibrate at a frequency of 4.36 x 10² Hz is sounded at the same time the piano key is struck, and a beat frequency of 8 beats per second is heard. (a) Find the two possible frequencies at which the string could be vibrating. flower = fhigher = Hz Hz (b) Suppose the piano tuner runs toward the piano, holding the vibrating tuning fork while his assistant plays the note, which is at 428 Hz. At his maximum speed, the piano tuner notices the beat frequency drops from 8 Hz to 4 Hz (without going through a beat frequency of zero). How fast is he moving? Use a speed of sound of 343 m/s. m/s (c) While the piano tuner is running, what beat frequency is observed by the assistant? [Note:

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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1.1A 2 kHz sound wave traveling in the x direction in air wasobserved to have a differential pressure p(x, t) = 10 N/m2 atx = 0 and t = 50 μs. If the reference phase of p(x, t) is 36◦,find a complete expression for p(x, t). The velocity of soundin air is 330 m/s.1.2 For the pressure wave described in Example 1-1, plot thefollowing:(a) p(x, t) versus x at t = 0(b) p(x, t) versus t at x = 0Be sure to use appropriate scales for x and t so that each of yourplots covers at least two cycles. for both of the problem can you please also sketch the graph and explain me how to do it i have problem with sketching can you please explain the details thank you so much
Need Help? Submit Answer ARHSCALC1 5.2.062. Read It MY NOTES With the installation of noise suppression materials, the noise level in an auditorium was reduced from 95 to 81 decibels. The level of sound 3 (in decibels) with an intensity of I is B(I) = 10 log10 (I/I0), where Io is an intensity of 10-16 watt per square centimeter, corresponding roughly to the faintest sound that can be heard. Use this information to find the percent decrease in the intensity level of the noise as a result of the installation of these materials. (Round your answer to the nearest percent.) % ASK YOUR TEACHER PRACTICE ANOTHER
Problem 3 Tendons are, esentially, elastic cords stretched between two fixed ends. As such, they can support standing waves. A woman has a 23 cm -long Achiles tendon-connecting the heel to a muscle in the calf-with a cross-section area of 84 mm The density of tendon tissue is 1100 kg/m Part A For a reasonable tension of 470 N what will be the fundamental hequency of her Achiles tendon? Express your answer to two significant figures and include the appropriate units. 1- Value Hz Submit Request Answer Provide Feedback
1.1 A 2 kHz sound wave traveling in the x direction in air wasobserved to have a differential pressure p(x, t) = 10 N/m2 atx = 0 and t = 50 μs. If the reference phase of p(x, t) is 36◦,find a complete expression for p(x, t). The velocity of soundin air is 330 m/s.1.2 For the pressure wave described in Example 1-1, plot thefollowing:(a) p(x, t) versus x at t = 0(b) p(x, t) versus t at x = 0Be sure to use appropriate scales for x and t so that each of yourplots covers at least two cycles for the second part can you show me step by step how to plot the graph which function did you use to plot it the original function or the after solving for p(x,t). my problem is the graph i want to know how did you do it .I ask earlier from an expert he just plot the graph and i dont know where those number came from so please help me step by step thank you
[Expect to use one single-sided A4 page for each Section-B sub-question.] Question B1 a) Calculate the frequency (in Hz) of the 2nd overtone emitted by an open pipe of length 1.5 m. The speed of sound in air is 343 m/s.
Question 3 Write down the mathematical function for a wave whose maximum ampli- tude is 3 m, and which travels with a speed of 350 m/s. Let the linear frequency of this wave be 1000 Hz.
Two strings on a musical instrument are tuned to play at 392 Hz (G) and 494 Hz (B). Express your answers using three significant figures. Πν ΑΣφ ? lB Submit Request Answer Part E If their masses and lengths are the same, what must be the ratio of the tensions in the two strings? Express your answers using three significant figures. ? Fr,G FT,B Submit Request Answer II
Constants I Periodic Consider a sine wave traveling down the stretched two- part cord of the figure.(Figure 1) Determine a formula for the ratio of the wavelengths in the two sections. (The frequency is the same in both sections.) Express your answer in terms of the variables µH and uL. ? Ан Submit Request Answer Figure 1 of 1 Part C Light section Heavy section Is the wavelength larger in the heavier cord or the lighter? (a) in the heavier cord Transmitted in the lighter cord pulse Submit Request Answer Reflected pulse (b) Provide Feedback II
Please answer all 3 sub-parts 1. You let go of a 0.3kg ball from a height of 2m. When the ball bounces off the ground, it loses 15% of its energy as sound. a) How much energy does the ball lose during the bounce? b) How high does the ball bounce back up after hitting the ground? c) What initial speed would the ball need to be thrown downward at so that it would bounce back up to a maximum height of 2m?
Task 4 A support beam is subjected to vibrations along its length, emanating from two machines situated at opposite ends of the beam. The displacement caused by the vibrations can be modelled by the following equations,x1 = 3.75 sin (100zt +) m *2 = 4.42 sin (100mt- a. State the amplitude, phase, frequency and periodic time of each of these waves. b. When both machines are switched on, how many seconds does it take for each machine to produce its maximum displacement? c. At what time does each vibration first reach a displacement of -2mm? d. Use the compound angle formulae to expand x, and xz into the form A sin 100zt + B cos 100nt, where A and B are numbers to be found.
Task 4 A support beam is subjected to vibrations along its length, emanating from two machines situated at opposite ends of the beam. The displacement caused by the vibrations can be modelled by the following equations,x1 = 3.75 sin ( 100nt + 27 mm x2 = 4.42 sin (100nt –)r 2n mm a. State the amplitude, phase, frequency and periodic time of each of these waves. b. When both machines are switched on, how many seconds does it take for each machine to produce its maximum displacement? c. At what time does each vibration first reach a displacement of - 2mm? d. Use the compound angle formulae to expand x1 and x2 into the form A sin 100nt ± B cos 100nt, where A and B are numbers to be found.
SHOW ALL WORK 1)Loudspeakers can produce intense sounds with surprisingly small energy input in spite of their low efficiencies. Calculate the power input needed to produce a 90.0-dB sound intensity level for a 12.0-cm-diameter speaker that has an efficiency of 100%. (This value is the sound intensity level right at the speaker.) 2)Ten cars in a circle at a boom box competition produce a 120-dB sound intensity level at the center of the circle. What is the average sound intensity level produced there by each stereo, assuming interference effects can be neglected? 3)How much more intense is a sound that has a level 17.0 dB higher than another? 4)If one sound has a level 23.0 dB less than another, what is the ratio of their intensities? 5) Marcelo is facilitating the class with his normal voice. Student A, siting at 6 meters from Marcelo hears his voice with an intensity of 70dB a)How much is the Power of the sound Marcelo produces? b)Student B is sitting at 10 meters from…