A car moves in a straight line away from a stationary listener while its horn produces a sound of frequency $f_0$. The car's speed is $0.20v$,where $v$ represents the speed of sound. What is the apparent frequency of the horn as perceived by the observer?

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A car moves in a straight line away from a stationary listener while its horn produces a sound of frequency $f_0$ . The car's speed is $0.20v$ ,where $v$ represents the speed of sound. What is the apparent frequency of the horn as perceived by the observer?

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A car moves in a straight line away from a stationary listener while its horn produces a sound of frequency $f_0$. The car's speed is $0.20v$,where $v$ represents the speed of sound. What is the apparent frequency of the horn as perceived by the observer?

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