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College Physics Reasoning and Relationships

Physics & Astronomy

Quiz 13 :

Sound

Quiz 13 :

Sound

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How far away is a lightning bolt if it takes 20 s for the sound of the associated thunder to reach the observer?
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Multiple Choice
Answer:

Answer:

B

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Material 1 has Young's modulus img and density img , and material 2 has Young's modulus img and density img . If img is 30% more than img and img is 30% less than img , which material has the higher speed of sound and how much higher is it?
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Answer:

A

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Which of the following ranges corresponds to the shortest wavelengths?
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Answer:

C

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Material 1 has Young's modulus img and density img , material 2 has Young's modulus img and density img , and material 3 has Young's modulus img and density img . If img and if img , which material has the highest speed of sound?
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When a sine wave is used to represent a sound wave, the crest corresponds to:
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Which of the following best describes a sound level of intensity 10-6 W/m2?
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When a sound wave moves through a medium such as air, the motion of the molecules of the medium is in what direction (with respect to the motion of the sound wave)?
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The density of a certain solid is 7.2 103 kg/m3, and its Young's modulus is 8.0 1010 N/m2. What is the speed of sound in this material?
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A sound wave in air has a frequency of 515 Hz and a wavelength of 0.68 m. What is the air temperature?
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Consider a vibrating guitar string that makes a sound wave that moves through the air. As the string moves up and down, the air molecules that are a certain horizontal distance from the string will move:
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The speed of sound in air is a function of which one of the following?
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What is the intensity level of a sound with intensity of 5.0 1011 W/m2? (I0 = 1012 W/m2)
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Doubling the power output from a speaker emitting a single frequency will result in what increase in loudness?
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The frequency separating audible waves and ultrasonic waves is considered to be 20 kHz. What wavelength in air at room temperature is associated with this frequency? (Assume the speed of sound to be 340 m/s.)
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Comparing the speed of sound in liquids, gases, and solids, the speed of sound is usually lowest in _____ and highest in _____.
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How far away is a lightning strike if you hear the thunderclap 2.00 s after you see the lightning bolt strike? (vsound = 340 m/s, vlight = 3 108 m/s)
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The speed of sound at 0C is 331 m/s. What is the speed of sound at 32C? (0C = 273 K)
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A chamber that can be filled with different gases has placed in it a source of sound that in air produces a frequency of 200 Hz and a microphone to pick up the sound for frequency analysis. First the chamber is filled with helium (speed of sound 1000 m/s at room conditions), then the helium is replaced with oxygen (speed of sound 330 m/s at room conditions), and then finally the helium is replaced with carbon dioxide (speed of sound 269 m/s at room conditions). In which gas is the highest frequency of sound found by the microphone during this experiment?
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A sound wave coming from a tuba has a wavelength of 0.674 m and travels to your ears at a speed of 345 m/s. What is the frequency of the sound you hear?
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A series of ocean waves, 2.5 m between crests, move past at 2.0 waves/s. Find their speed.
Multiple Choice
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