EXPERIMENT 3 - Anil Kanungo (ASK 358) Partner: Kristela...

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Anil Kanungo (ASK 358) Partner: Kristela Garcia PHY 115L – 60675 September 25, 2008 EXPERIMENT 3 – Velocity of Sound in Air [Introduction]: 1) The velocity of the particles would be zero at the closed end. This is analogous to a spring with a fixed end. In this case, pressure is the fixing component that does not allow waves to oscillate past it. 2) Pressure would be so great at a closed end, it would prevent any waves from forming. The velocity here is also therefore zero. 3) If dust were placed in the tube, then theses oscillations and nodes would become visible. You would be able to observe precisely where the nodes and antinodes were because the pressure in the tube would form the “dust heaps.” Points where pressure was the greatest would have the least amount of dust (it would be pushed out) and points with the most dust would have lowest pressure. This is consistent with later in the experiment when we perform this exact procedure. [Air Column-Tuning Form Method for Determining Velocity of Sound in Air, C Air ]: 1) As a closed end of a tube would have a node in velocity and antinode in pressure, the open end would have the opposite. That is, the open end would have an antinode in velocity and a node in pressure. 2)
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This note was uploaded on 02/12/2009 for the course PHY 115L taught by Professor Antoniewicz during the Fall '08 term at University of Texas at Austin.

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EXPERIMENT 3 - Anil Kanungo (ASK 358) Partner: Kristela...

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