1. What makes some sounds louder than others?
2. Explain the relationship between frequency and pitch.
3. How can you change the pitch produced by a vibrating string?
4. Explain how resonance can cause a crystal glass to shatter.
5. What is the Doppler Effect?
6. If you are riding in a fire truck with the siren blaring, you do not hear the Doppler effect. Explain.
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