There are three sources of sound of equal intensity with frequencies 400, 401, 402 vibrations /sec. The number of beats heard per second I s

There are three sources of sound of equal intensity with frequencies 4

1.	There are three sources of sound of equal intensity with frequencies 400, 401, 402 vibrations /sec. The number of beats heard per second I s
A.	1
B.	2
C.	3
D.	0
Answer» B. 2

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There are three sources of sound of equal intensity with frequencies 400, 401, 402 vibrations /sec. The number of beats heard per second I s

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