6) 2 sinusoidal waves are traveling in opposite direction and have thefollowing wave functions:y1 = 0. 6 sin (+0,25t + 27x)y2 = 0. 6 sin (-0,25t + 27x)Determine the maximum amplitude of the point situated at x= 0.5mdue to the resultant waveA- Amplitude = 1. 2 mB- Amplitude = 0.6 mC-Amplitude = 0.3 mD -Amplitude = 0.1mE- Amplitude = 0 mAВDE Q55) A standing wave is formed in a chord of length 3 m . The observedwave is formed from 5 loops using a vibrator frequency of 20 Hz anda mass attached of 120g. Determine the speed of the waves formingthe resultant standing wave.VihratorA V = 24m/secB- V = 18m/secC-V = 12m/secD- V= 6m/secE- V= 2m/secAВCDE

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6) 2 sinusoidal waves are traveling in opposite direction and have the following wave functions: y1 = 0. 6 sin (+0,25t + 27x) y2 = 0.6 sin (-0,25t Determine the maximum amplitude of the point situated at x= 0.5m 2nx) due to the resultant wave A- Amplitude = 1.2 m B- Amplitude = 0.6 m C-Amplitude = 0.3 m D-Amplitude = 0. 1m E Amplitude = 0 m

6) 2 sinusoidal waves are traveling in opposite direction and have the following wave functions: y1 = 0. 6 sin (+0,25t + 27x) y2 = 0.6 sin (-0,25t Determine the maximum amplitude of the point situated at x= 0.5m 2nx) due to the resultant wave A- Amplitude = 1.2 m B- Amplitude = 0.6 m C-Amplitude = 0.3 m D-Amplitude = 0. 1m E Amplitude = 0 m

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter17: Sound

Section: Chapter Questions

Problem 131AP: Consider the following figure. The length of the string between the string vibrator and the pulley...

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A string with a linear mass density of =0.0062 kg/m is stretched between two posts 1.30 m apart. The tension in the string is 150.00 N. The string oscillates and produces a sound wave. A 1024-Hz tuning fork is struck and the beat frequency between the two sources is 52.83 Hz. What are the possible frequency and wavelength of the wave on the string?
A sound wave moves down a cylinder as in Figure 16.17. Show that the pressure variation of the wave is described by P=smax2s2, where s = s(x, t) is given by Equation 16.28.
The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound wave increase if the sound intensity level goes up by 40.0 dB?
By what fraction will the frequencies produced by a wind instrument change when air temperature goes from 10.0°C to 30.0°C? That is, find the ratio of the frequencies at those temperatures.
A dolphin (Fig. P17.7) in seawater at a temperature of 25C emits a sound wave directed toward the ocean floor 150 m below. How much time passes before it hears an echo?
Sine waves are sent down a 1.5-m-long string fixed at both ends. The waves reflect back in the opposite direction. The amplitude of the wave is 4.00 cm. The propagation velocity of the waves is 175 m/s. The n=6 resonance mode of the string is produced. Write an equation for the resulting standing wave.
On a marimba (Fig. P18.75), the wooden bar that sounds a tone when struck vibrates in a transverse standing wave having three ant modes and two nodes. The lowest-frequency note is 87.0 Hz, produced by a bar 40.0 cm long, (a) Find the speed of transverse waves on the bar. (b) A resonant pipe suspended vertically below the center of the bar enhances the loudness of the emitted sound. If the pipe is open at the top end only, what length of the pipe is required to resonate with the bar in part (a)?
What frequencies will a 1.80-m—long tube produce in the audible range at 20.0°C if: (a) The tube is closed at one end? (b) It is open at both end?
An outside loudspeaker (considered a small source) emits sound waves with a power output of 100 W. (a) Find the intensity 10.0 m from the source. (b) Find the intensity level in decibels at that distance. (c) At what distance would you experience the sound at the threshold of pain, 120 dB?
Consider the following figure. The length of the string between the string vibrator and the pulley is L=1.00 m. The linear density of the string is =0.006 kg/m. The string vibrator can oscillate at any frequency. The hanging mass is 2.00 kg. (a)What are the wavelength and frequency of n=6 mode? (b) The string oscillates the air around the string. What is the wavelength of the sound if the speed of the sound is vs=343.00 m/s?
Suppose a bat uses sound echoes to locate its insect prey, 3.00 m away. (See Figure 17.6.) (a) Calculate the echo times for temperatures of 5.00°C and 35.0°C. (b) What percent uncertainty does this cause for the bat in locating the insect? (c) Discuss the significance of this uncertainty and whether it could cause difficulties for the bat. (In practice, the bat continues to use sound as it closes in, eliminating most of any difficulties imposed by this and other effects, such as motion of the prey.)