Physics · Sound

What is the minimum distance a person must stand at from a reflecting surface to hear a distinct echo (assuming speed of sound in air is approximately 344 m/s)?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

19.4 m
29.4 cm
317.2 cm
417.2 m✓

Correct answer

17.2 m

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What is the minimum distance a person must stand at from a reflecting surface to hear a distinct echo (assuming speed of sound in air is approximately 344 m/s)?

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What is the minimum distance a person must stand at from a reflecting surface to hear a distinct echo (assuming speed of sound in air is approximately 344 m/s)?

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