Sound problem

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You hear something slitering toward you in the dark. You know from past experience that somethings slither with a frewuency of 130 Hz. If you hear a frequency of 130+17 Hz, how fast is the litherer slithering toward you (in m/s)? The speed of sound is 300 m/s


Is is a doppler effect problem? But there is no wavelength given in here? Can anybody tell me how to do it?
 

Galileo

Science Advisor
Homework Helper
1,989
5
Use the relation between wavelength, frequency and velocity to find the wavelength: [itex]v=\lambda f[/itex].
It's very easy to remember this formula, since f=1/T with T the period. The wave will travel 1 wavelength in 1 period, so v=wavelength/period.
 

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