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A tube creates three adjacent resonant frequencies of 75, 105 and 135 Hz. Is the tube open at both ends or closed at one end?

A tube creates three adjacent resonant frequencies of 75, 105 and 135 Hz. Is the tube open at both ends or closed at one end? Show all work necessary to prove your answer of OPEN or CLOSED. 4- Drag and drop an image or PDF file or click to browse

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