Chapter 16 Sound

Sound is able to travel in a vacuum

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When matter vibrates, sound is created

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The speed of sound in solids is the fastest

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At 0⁰C, the speed of sound increases to 331 m/s

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In a human ear, the vibrations are transferred by hammer, anvil and cochlea

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Sounds can differ in pitch and loudness

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The lower the frequency, the lower the pitch of the sound produced

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Humans can still hear sounds above 2x10⁵ Hz

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The loudness of sound depends on how big the frequencies in the medium are

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Warning sounds made by many hunting animals are low-pitched

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