Question: An echo is sound that returns to you after being reflected from a distant surface (e.g., the side of a cliff ). Assuming that the

An echo is sound that returns to you after being reflected from a distant surface (e.g., the side of a cliff ). Assuming that the distances involved are the same, an echo under water and an echo in air return to you ________________.

(a) At different times, the echo under water returning more slowly

(b) At different times, the echo under water returning more quickly

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