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14 *14 A teacher is teaching her class about the phenomenon of resonance. To do this, she uses a drinking glass to produce sound in

14

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*14 A teacher is teaching her class about the phenomenon of resonance. To do this, she uses a drinking glass to produce sound in two different ways. DO NOT WRITE IN THIS AREA When the glass is gently struck, the glass emits sound for a short time. When a wet finger is slid around the top of the glass, it is possible to produce a loud continuous sound. THIS AREA Explain these observations

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