The source of sound generating of a frequency of 3 kHz reaches an obs – McqOptions

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1.	The source of sound generating of a frequency of 3 kHz reaches an observer with a speed of 0.5 times the velocity of sound in air. The frequency heard by the observer is?
A.	1 kHz
B.	3 kHz
C.	4 kHz
D.	6 kHz
Answer» E.

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