Sometimes, when the wind blows across a long wire, a low-frequency "moaning" sound is produced. The sound arises because a stand
ing wave is set up on the wire, like a standing wave on a guitar string. Assume that a wire (linear density = 0.0120 kg / m ) sustains a tension of 341 N because the wire is stretched between two poles that are 16.86 m apart. The lowest frequency that an average, healthy human ear can detect is 20.0 Hz. What is the lowest harmonic number n that could be responsible for the "moaning" sound? Answer is not n= 4.47
