Thursday, 23 April 2020

Measuring the speed of Sound in a Column

In this experiment I have taken a tuning fork, a hollow tube and a measuring cylinder filled with water. The hollow tube can move up and down creating a length of air in the column above the water. The tuning fork is placed over the column and the column moved up and down until the loudest sound is heard. The length of the tube is a quarter of the wavelength, so we multiply the column  length by 4.
We know that the velocity = frequency x wavelength
So if the column is 19.4cm long then the wavelength is 19.4 x 4 = 77.6
The frequency of the tuning fork is 440Hz
So the velocity = 0.776 x 440 = 341.44 m/s

https://www.youtube.com/watch?v=G7yl43Zvy8E


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