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Today: Chapter 19 Vibrations and Waves

Vibrations. Some Preliminaries Vibration = oscillation = anything that has a back-and-forth to it Eg. Draw a pen back and forth over the same line, repeatedly:When you come back to the same point defines one cycle, one vibrationIf do it faster, your

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Today: Chapter 19 Vibrations and Waves

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    1. Today: Chapter 19 (Vibrations and Waves)

    2. Vibrations Some Preliminaries Vibration = oscillation = anything that has a back-and-forth to it Eg. Draw a pen back and forth over the same line, repeatedly: When you come back to the same point defines one cycle, one vibration If do it faster, your “frequency” is higher, your “period” is less. But your “amplitude” (max. displacement) is the same – it’s bigger if the line is bigger. (We’ll come back to these terms shortly) Wave = vibration in both space and time i.e. goes from one place to another: A vibration that propagates in space

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