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: 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?
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
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:
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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Hi I was wondering how did you guys get the 0.888m as the wavelength.
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