The physics of wave interference. 1. Two pulses as shown below are approaching each other. When they are directly on top of each other, draw the resulting pulse. pulse A pulse B The physics of a standing wave pattern. 2. Standing waves are set up in a string by a source vibrating at 100.0 Hz. Seven nodes are counted in a distance of 63.0 cm (including one node at each of the ends). a. How many wavelengths must there be in the string? b. What is the wavelength of the waves in the string? c. What is the distance between each node? d. What is the speed of these waves?

The physics of wave interference. 1. Two pulses as shown below are approaching each other. When they are directly on top of each other, draw the resulting pulse. pulse A pulse B The physics of a standing wave pattern. 2. Standing waves are set up in a string by a source vibrating at 100.0 Hz. Seven nodes are counted in a distance of 63.0 cm (including one node at each of the ends). a. How many wavelengths must there be in the string? b. What is the wavelength of the waves in the string? c. What is the distance between each node? d. What is the speed of these waves?

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter14: Sound

Section: Chapter Questions

Problem 7CQ: You are driving toward the base of a cliff and you honk your horn. (a) Is there a Doppler shift of...

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When sound passes from one medium to another where its propagation speed is different, does its frequency or wavelength change? Explain your answer briefly.
You are driving toward the base of a cliff and you honk your horn. (a) Is there a Doppler shift of the sound when you hear the echo? If so, is it like a moving source or moving observer? (b) What if the reflection occurs not from a cliff, but from the forward edge of a huge alien spacecraft moving toward you as you drive?
(a) What are the loudnesses in phons of sounds having frequencies of 200, 1000, 5000, and 10,000 Hz. if they are all at the same 60.0dB sound intensity level? (b) If may are all at 110 dB? (c) If they are all at 20.0 dB?
What frequency sound has a 0.10m wavelength when the speed of sound is 340 m/s?
. The frequency of middle C on the piano is 261.6 Hz. (a) What is the wavelength of sound with this frequency as it travels in air at room temperature? (b) What is the wavelength of sound with this frequency in water?
Air temperature in the Sahara Desert can reach 56.0°C (about 134°F). What is line speed of sound in air at that temperature?
Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 3 m long, its mass is 0.5 kg, and the force excited on it by the children is 40 N. (a) What is the linear mass density of the rope? (b) What is the speed of the waves on the rope?
Many of the topics discussed in this chapter are useful beyond the topics of mechanical waves. It is hard to conceive of a mechanical wave with sharp corners, but you could encounter such a wave form in your digital electronics class, as shown below. This could be a signal from a device known as an analog to digital converter, in which a continuous voltage signal is converted into a discrete signal or a digital recording of sound. What is the result of the superposition of the two signals?
3) A wave has a frequency of 262 HzWhat is the time interval between successive wave crests?
1)By what factor must you increase the intensity of a sound in order to hear a 1.0-dB rise in the sound level? (Express your answer to two significant figures.) 2)What about a 22-dB rise? (Express your answer to three significant figures.)
What is a mechanical wave? What does a wave do? Based on their motions waves can be classified as one of two types. What are these two classifications and what are the relevant motions for each? What is sound? What aspect of a sound wave indicates how loud the sound is? What happens when you move away from the source of the sound? What quantity is involved in calculating this effect? What determines the speed of a sound (or any mechanical) wave?
1. Is the Doppler shift real or just a sensory illusion? Explain your answer.