Mini-Quiz: Sound Created from a String or Wire

1. If the string must be pulled tight, how can it vibrate?

   The material will stretch and then bounce backThat is correct. You are becoming a sound Champion. You must loosen the string so it can vibrateSorry, not correct. Try another button. No one is really sure what happens when it vibratesGood try, but not right. Select another answer.

2. How does a vibrating wire create sound?

   Vibrating wires cannot create sound; only vibrating strings create soundSorry, not correct. Try another button. The regular movement of the wire causes a vibration in the air at the same frequencyCorrect. You know about strings and sound The vibrations of the wire is the sound, and you must put your ear to it to hear the soundOops! Wrong answer. Re-read the question and try again.

3. What are possible higher harmonics of a string with a fundamental of 330 Hz?

   660 Hz, 1320 Hz, 1980 HzThat is correct. You are becoming a sound Champion. 340 Hz, 350 Hz, 360 HzGood try, but not right. Select another answer. 165 Hz, 330 Hz, 660 HzOops! Wrong answer. Re-read the question and try again.

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