A drainage pipe running under a freeway is 33.0 m longBoth ends of the pipe are openand wind blowing across one end causes the air inside to vibrate What the frequency of the lowest harmonic that would be audible to the human ear? The frequency we can hear is about 20 Hz)?

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A: Given data: Length of pipe, L=0.500 m Speed of sound wave in air, vo=343 m/s

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Q: Please help:

A: option second: The short pipe      correct option

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A: The strings that are wrapped with another wire, are always used to produce a low-frequency note.

Q: length of the air column in a resonace

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A: C

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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.