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Chapter 21: Sound

Chapter 21: Sound. Pages 532 - 557. Sound is a form of energy produced by the vibration of matter. Sound is a compressional or longitudinal wave Ex. Spring Sound is transmitted through solids, liquids, and gases. Sound is transmitted better through solids and liquids. Why? More dense

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The Doppler Effect

The Doppler Effect. The Doppler Effect. Doppler Effect – Change in frequency and wavelength of a wave for an observer moving relative to the source of the wave. Source is moving and observer is stationary. Source is stationary and observer is moving. Source and observer are both moving.

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Sound

Sound. by, Drew Harris. Vibrations. Back and forth movements like “snapping a ruler” are vibrations. When you hum, you can feel vibrations by putting your fingers on your throat. Sound is vibrations you can hear. You can see and feel things vibrate, but not the sound in the air.

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