When sound travels faster at ground level than higher in the air,sound tends to bend
A) upward.
B) downward.
C) neither of these
Correct Answer:
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A)sound interference.
B)forced vibrations.
C)re-echoed
Q75: The reflection of sound is
A)reverberation.
B)an echo.
C)a rare
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A)air.
B)water.
C)both of
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A)transmitted.
B)absorbed.
C)either
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A)minimum amplitude.
B)maximum
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