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College Physics Study Set 7

Physics & Astronomy

Quiz 14 :

Sound

Quiz 14 :

Sound

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Tripling the power output from a speaker emitting a single frequency will result in what increase in loudness?
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Answer:

C

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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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D

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How far away is a lightning strike if you hear the thunderclap 3.00 s after you see the lightning bolt strike? (vsound = 340 m/s, vlight = 3 * 108 m/s)
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D

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A sound wave coming from a tuba has a wavelength of 1.50 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 sound wave in air has a frequency of 500 Hz and a wavelength of 0.68 m.What is the air temperature?
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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 ranges corresponds to the longest wavelengths?
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Consider a vibrating string that makes a sound wave that moves through the air.As the guitar string moves up and down, the air molecules that are a certain horizontal distance from the string will move:
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A series of ocean waves, 5.0 m between crests, move past at 2.0 waves/s.Find their speed.
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The speed of sound in air is a function of which one of the following?
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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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If the intensity of a sound is increased by a factor of 100, how is the decibel level changed? The new decibel level will be:
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If one-third of the members of a symphony orchestra are absent because of head colds, thus reducing the overall intensity of sound by 33%, what will be the reduction in the decibel level?
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The speed of sound at 0C is 331 m/s.What is the speed of sound at 25C? (0C = 273 K)
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Assuming that the wave speed varies little when sound waves are traveling though a material that suddenly changes density by 10%, what percentage of the incident wave intensity is reflected?
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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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The density of a certain metal solid is 7.2 * 103 kg/m3, and its Young's modulus is 10 * 1010 N/m2.What is the speed of sound in this metal?
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What is the intensity level of a sound with intensity of 5.0 * 10-10 W/m2? (I0 = 10-12 W/m2)
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If I0 = 10-12 W/m2 is the threshold of hearing, a sound with intensity I1 = 10-11 W/m2 will give a certain decibel level.Suppose a new sound has an intensity I2 = I12/I0.What is the new decibel level?
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What is the intensity of a sound with a measured intensity level of 84 dB? (I0 = 10-12 W/m2)
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