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

Physics & Space Science

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A airplane that is flying level needs to accelerate from a speed of 200 m/s to a speed of 240 m/s while it flies a distance of 1200 m. What must the acceleration of the plane be?

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