When sound waves travel from one medium to another, which of the following physical quantities does NOT alter?

When sound waves travel from one medium to another, which of the follo

1.	When sound waves travel from one medium to another, which of the following physical quantities does NOT alter?
A.	Amplitude
B.	Velocity
C.	Frequency
D.	Intensity
Answer» D. Intensity

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When sound waves travel from one medium to another, which of the following physical quantities does NOT alter?

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