An observer standing by the side of a road hears the siren of an ambulance, which is moving away from him. If the actual frequency of the siren is 2000Hz, then the frequency heard by the observer will be __________

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Engineering Physics Practice Test: Waves — practice the complete quiz, review flashcards, or try a random question.

Wave topics include: Waves-transverse, longitudinal, progressive, travelling, stationary, superposition and sound waves, reverberation, acoustics and beats.   A wave is a disturbance that propagates dynamically. Waves can have many characteristics, including: Amplitude: The maximum displacement of a wave, measured in meters Frequency: A characteristic of waves that can be used to measure them Wavelength: A significant variable used to define wave characteristics Period: A characteristic of waves Speed: A characteristic of waves Phase: A characteristic of waves  Waves can be... Show more

An observer standing by the side of a road hears the siren of an ambulance, which is moving away from him. If the actual frequency of the siren is 2000Hz, then the frequency heard by the observer will be __________