Physics, 20.08.2019 22:30 annalaurie7
Asiren mounted on the roof of firehouse emits sound at a frequency of 815 hz. a steady wind is blowing with a speed of 14.4 m/s. take the speed of sound in calm air to be 343 m/s (a) find the wavelength of the sound upwind of the siren. (b) find the wavelength of the sound downwind of the siren m f he or she is approaching from an upwind (c) firefighters are approaching the siren from various directions at 19.5 m/s. what frequency does a firefighter hear position, so that he or she is moving in the direction in which the wind is blowing? hz (d) what frequency does a firefighter hear if he or she is approaching from a downwind position and moving against the wind?
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