In which of the following conditions would a person not hear an echo? A. A sound wave reaches the ear, and the reflected wave reaches the ear less than 0.1 seconds later. B. A person is standing in the range of the sound waves coming from the original sound source as well as the reflected waves. C. The reflecting source is approximately 21.5 meters from the person. D. A person is standing 30 meters in front of the reflecting surface.

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A sound wave reaches the ear and the reflected wave reaches the ear less than 0.1 second later describes a condition in which an individual would not hear an echo.

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Asked 5/7/2019 7:45:24 AM

Updated 5/17/2021 5:03:09 PM

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Wallet.ro

A sound wave reaches the ear and the reflected wave reaches the ear less than 0.1 second later describes a condition in which an individual would not hear an echo.

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Kuarten-

4.3t + 6.8 = 8.4t - 7.55; 8.4t - 4.33t = 6.8 + 7.55; 4.1t = 14.35; t = 14.35/4.1; t = 3.5

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