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2. When a certain string is clamped at both ends, four consecutive reso-nant frequencies are
measured to be 100, 150, 200, and 250 Hz. One of the resonant frequencies (below 200
Hz) is missing. Which one?
Ans. 50 Hz
3. A string fixed at both ends is 8.40 m long and has a mass of 0.120 kg. It is subjected to a

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