A string 1.2 m long, fixed at both ends, carries waves at 240 m/s. What is the frequency of its third harmonic?
Answer and explanation
Correct answer: A. 300 Hz
- Step 1: The fundamental is Hz. Step 2. The third harmonic is Hz. Answer: 300 Hz. Why not the others: 100 Hz is the fundamental; 200 Hz is the second harmonic; 600 Hz uses without the factor 2 in the denominator.
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