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Your friend is playing a song on a piano...

Your friend is playing a song on a piano. Whenever your friend hits a certain key, the lamp on top of the piano rattles. Explain why the lamp rattles.

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### Step-by-Step Solution: 1. **Understanding the Setup**: - We have a piano and a lamp placed on top of it. When a specific key on the piano is played, the lamp rattles. 2. **Concept of Vibration**: - Every object, including the lamp, has a natural frequency at which it vibrates. This is known as its natural frequency (fn). ...
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