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Physics 13 Online
OpenStudy (lilday12):

Which of the following statements is true? A. An echo is a sound wave reflection. B. Sound waves are the only waves that reflect. C. Reflection is when a sound wave bends around an obstacle. D. In reflection, all of the initial energy of the sound wave bounces back.

OpenStudy (anonymous):

A is the answer. Its definition is what comes in A.

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