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 a) Use the resonant lengths to do three calculations to find the wavelength. Find the average wavelength and use that in further calculations. b) Using the wave equation, what is the speed of sound in the air column? c) What is the theoretical speed of sound in the room according to the temperature?
Interference of sound
Seiche
A seiche is an oscillating standing wave in a body of water. The term seiche pronounced saysh) can be understood by the sloshing of water back and forth in a swimming pool. The same phenomenon happens on a much larger scale in vast bodies of water including bays and lakes. A seizure can happen in any enclosed or semi-enclosed body of water.
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
a) Use the resonant lengths to do three calculations to find the wavelength. Find the average
wavelength and use that in further calculations.
b) Using the wave equation, what is the speed of sound in the air column?
c) What is the theoretical speed of sound in the room according to the temperature?
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