Two Strings of Identical Mass Per Unit Length Are Stretched

question 20

Multiple Choice

Two strings of identical mass per unit length are stretched with the same tension with their ends fixed, but one string is 0.33 cm longer than the other. Waves on these strings propagate at 34.0 m/s. The fundamental frequency of the shorter string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency?

• A) 12.3 Hz
• B) 9.00 Hz
• C) 12.0 Hz
• D) 12.7 Hz
• E) 11.3 Hz

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