1. A long cylindrical gas-tight tube, with a sound source at one end and sensor at the other, was constructed to measure the speed by recording the time it take a sound wave to travel the length of the tube (see diagram).
i. Initially, the tube was filled with air at atmospheric pressure (P=1.012x105Pa & T=295.2K). When a sound wave is produced by the source, the elapsed time for the wave to reach the sensor was 3.64x10-3s. Determine the length of the gas tube (i.e. distance between source and sensor). Hint: You will first need to calculate the speed of sound at this temperature.
ii. The air was then removed from the tube and it was filled with a diatomic gas. In a series of experiments, the speed of sound was measured in the gas at various gas temperatures. The wave speed vs temperature graph for the experiment is shown below, as well as the corresponding curve fit generated.
a. Express value of the fit constant "A" in the graph in SI units. Include the units in v your answer.
b. Use the fit constant "A" to estimate the average mass of one of the gas particles inside the container. Note: Use the accepted value for Boltzmann Constant.
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A long cylindrical gas-tight tube, with a sound source at one end and sensor at the other
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