UNIT EIGHT: Waves. Chapter 24 Waves and Sound Chapter 25 Light and Optics. Chapter Twenty-Four: Waves and Sound. 24.1 Harmonic Motion 24.2 Properties of Waves 24.3 Sound. Chapter 24.3 Learning Goals. Describe properties of sound.
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Each person is saying “Hello”.
The process that allows a cell phone to communicate is the same as for a radio or walkie-talkie. All of these devices use electromagnetic waves of within a specific frequency range to send information.