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A fire engine is driving directly away from a solid wall at 35 m/s on a hot 30.0 C day while its siren emits a steady 455. Hz sound. The speed of sound on this day is 349 m/s.
1) Compute the wavelength of the waves as they approach the stationary listener.
2) A firefighter on the back of the fire engine hears the sound waves after they are reflected from the wall. What is the frequency of this reflected wave as heard by this firefighter?
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