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A sound wave of frequency f=300Hz produced by a moving source 40m/s is observed by a...

A sound wave of frequency f=300Hz produced by a moving source 40m/s is observed by a stationary observer. The speed of sound in ambient air is 345 m/s.

  1. As the source moves toward the observer, how far does the source travel between subsequent wave pulses?
  2. What is the apparent wavelength of the sound wave as perceived by the observer?
  3. What is the frequency of sound perceived by the observer? Note, when the source is in motion, the speed of the sound waves remains the same to both the observer and the source.
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