What type of surface is needed for the reflection of sound waves?
(a) Smooth surface only
(b) Polished and smooth surface
(c) Hard surface only
(d) Polished and rough surface
Answers
Answered by
3
Answer:
it's (b) polished and smooth surface
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Answered by
2
Answer:
option d
Explanation:
polished and rough surface is needed for reflection of sound waves
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