A drainage pipe running under a freeway is 30.0 m long. Both ends of the pipe are open, and wind blowing across one end causes the air inside to vibrate.a. If the speed of sound on a particular day is 340 m/s, what will be the fundamental frequency of air vibration in this pipe?b. What is the frequency of the lowest harmonic that would be audible to the human ear?c. What will happen to the frequency in the later afternoon as the air begins to cool?

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Q: a

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Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.