Chapter 14a - Chapter 14A Sound Sound waves are...

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Chapter 14A 1 Sound Sound waves are longitudinal pressure waves created by a vibrating object. Some medium must be present. Sound will not travel through a vacuum. There is no bulk movement of the medium. Sound waves travel faster in solids than in liquids, and faster in liquids than in gases.
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Chapter 14A 2 Sound The cone of a stereo speaker produces sound by vibrating back and forth. The forward movement of the speaker slightly compresses the air. The compression travels away from the speaker at the speed of sound. v sound
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Chapter 14A 3 Sound The reverse movement slightly rarifies the air. The rarefaction also travels away at the speed of sound. v sound
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4 Sound The magnitude of the pressure fluctuations ( P ) determines the loudness of the sound. These pressure fluctuations Cause your eardrum to vibrate. Carry energy from the speaker to your ear. Do work on your eardrums. P
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Chapter 14a - Chapter 14A Sound Sound waves are...

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