Integrated Coordinated Science for the 21st Century
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Answers
Physics To Go
- a) By changing the weight hung on the end of the string (or, in an instrument, by turning the knobs on the tuning machine).
b) Increasing the tension increases the pitch of the sound.
- a) By pressing the string down against the tabletop.
b) Decreasing the length of the string increases the pitch of the sound.
- The right combination of decreasing the length and decreasing the tension (or increasing both) can keep the pitch the same.
- In general, the pitch would change. (See answer to Question 3.)
- a) For the guitar, by pressing the string down on the neck of the guitar; for the piano, by striking a different string.
b) For the guitar, by changing the string tension; for the piano, also by changing the string tension.
- a) To change the tension of the strings.
b) To make it easier to press the string against the neck at the right place, so the note has the right pitch.
c) No.
d) Because the player must judge where to press the string down so each note has the correct pitch.
- a - c) Student activity.
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