Standing Waves on a String: a 1

question 49

Multiple Choice

Standing waves on a string: A 1.0-g string that is 0.64 m long is fixed at both ends and is under tension. This string produces a 100-Hz tone when it vibrates in the third harmonic. The speed of sound in air is 344 m/s. The tension in the string, in is closest to

• A) 2.8 N.
• B) 2.3 N.
• C) 1.8 N.
• D) 3.4 N.
• E) 3.9 N.

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