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Unformatted text preview: standing wave that exhibits nodes and antinodes, which shorten the wavelength. If the tube is open, however, the resonating length multiplied by two is the wavelength because the wave is a standard wave that does not return from the end of the tube. We did three trials for each frequency of tuning fork and averaged them together to get the wavelength, then multiplied each by the frequency to find the velocity of sound in air. Data: See attached. Discussion: Having averaged the velocities of all our trials, the average velocity found was 359.79m/s, which is 5.73% off from the accepted value, which is 340.29m/s at sea level. The possible reasons for this discrepancy could be the fact that we are not located at sea level and that the exact resonance point was difficult to pinpoint. This lab would have been much simpler in a quiet, individual room without others around doing the same lab and making the same noise....
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- Fall '07