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- In this experiment the speed of sound in air will be determined by driving an air column in resonance. Resonance will occur when the standing wave pattern in the vibrating air column has an antinode (maximum amplitude) at the open end of the tube and a node (minimum amplitude) at the closed end of the tube. The length of the vibrating air column is the length between the top (open) end of the resonance tube and its closed end (water level).

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