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Physics, 27.11.2019 23:31 lucerogon7403

Why is an echo weaker than the original sound? 1. the echo has a shorter wavelength than the original sound due to the reﬂection. 2. the echo has a smaller amplitude than the original sound because sound spreads and its intensity decreases with distance. 3. the echo has a longer wavelength than the original sound due to the reﬂection. 4. the echo has a higher frequency than the original sound due to the reﬂection.

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