The temperature distribution found in standing waves in air in a Kundt tube is investigated by making use of the change in resistance of a thermistor moved the length of the tube. Two procedures are used. In one, values of thermistor currents are read along the tube and plotted against distances. In the other, actual thermistor resistances are measured and similarly plotted. Periodic variation of both current and resistance is evident. Using data obtained from the resistance variation curves, the actual temperature excursion is estimated. From the locations of the nodes and antinodes on current-distance graphs, the velocity of sound is calculated.
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© 1969 American Association of Physics Teachers.
1969
American Association of Physics Teachers
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