Sound Waves?
Picture here: http://tinyurl.com/3xzhas
This graph shows a sound wave consisting of a sinusoidal displacement of air particles versus time, as recorded at a fixed location. For sinusoidal waves, it is possible to identify a specific frequency (rate of oscillation) and wavelength (distance in space corresponding to one complete cycle).
Taking the speed of sound in air to be 344 m/s, what are the frequency f and the wavelength lambda of the sound wave shown in the graph?
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wavelength is 10^(-3) using v=f(lambda) frequency is 344/10^(-3)
From the picture: T = 10^-3seconds
f=1/T
f=1000 Hz
v=f(lambda)
lambda = 0.344 m
M1=approximately 779 miles per hour