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A rubber string is tied to a nail on the wall. The rubber string is pulled gently to stretch slightly. Which of the following phenomena may occur after the release of the string?

1. Sound is produced
2. Rubber string moves up and down
3. The quality of sound changes with the tension of the string
4. All the above happen

Correct answer: All the above happen

Solution

When the stretched rubber string is released, it can vibrate, producing sound. Those vibrations may include up-and-down motion, and the sound quality changes as the tension changes because tension affects vibration behavior.

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