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Problem:
Speed of sound
Asaad, a grade 11 student, completed a lab activity to find the speed of sound in air using a closed-air column. He measured the temperature of the room to be 21 °C. Using a tuning fork with a frequency of 1040 Hz, he obtained the following resonant lengths for the closed air column:
Observations:
L1 = 7.4 cm
L2 = 22.5 cm
L3 = 36.7 cm
Questions:
Question 1: Use the resonant lengths to do three calculations to find the wavelength. Find the average wavelength and use that in further calculations.
Question 2: Using the wave equation, what is the speed of sound in the air column?
Question 3: What is the theoretical speed of sound in the room according to the temperature?
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