English > QUESTIONS & ANSWERS > HESI A2 VERSION 1 2020-2021 (All)
HESI A2 VERSION 1 2020-2021
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2. What is the main idea of the passage? A. Trains and ambulances make distinctly loud noises. B. Low-frequency waves make high-pitched sounds. C. High-frequency waves make low-pitched sounds. D. ... The Doppler Effect explains the rationale for why sound is heard initially more strongly and then faintly after a moving object has passed. [Show More]
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