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Question
Define echo.
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Solution
A repeated sound that is caused by the reflection of the sound waves from the surface. The sound is heard more than once because of the time difference between the initial production of the sound waves and their return from the reflecting surface.
A repeated sound that is caused by the reflection of the sound waves from the surface. The sound is heard more than once because of the time difference between the initial production of the sound waves and their return from the reflecting surface.
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