monikademps01 monikademps01

06-10-2022
Physics

Answered

A fire truck emits sound waves at a constant frequency. An observer stands
several blocks away. Which statement best describes the sound waves
perceived by the observer as the fire truck approaches?
The wavelength and frequency both decrease.
The wavelength decreases and the frequency increases.
The frequency and wavelength remain the same.
The wavelength increases and the frequency decreases.

Answer :

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