Standing Waves on a String: A guitar-like stringed instrument has a string that is 16 cm long. It sounds the musical note A (440 Hz) when played without fingering. By what distance should you shorten it to play the note C (523 Hz)?
A. 2.5 cm
B. 1.7 cm
C. 3.4 cm
D. 4.2 cm
Answer: A
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