Mary is walking through the streets of downtown Tualatin and comes to an interse

Question

Mary is walking through the streets of downtown Tualatin and comes to an intersection where the walk signal is blinking to stop walking. Mary thinks she is smarter than the signal though and she tries to make a last minute run for the other side of the street. She realizes she isn't going to make it when a speeding truck coming toward her at the speed of 24 m s is honking its horn at the frequency of 6037 Hz. With what frequency is the wave reaching Mary right before she gets struck by the truck? (remember the speed of sound is 343 m/s)

Explanation / Answer

f' = [( V+Vo ) / ( V- Vs) ]*f

f' = [(343 + 0 ) / ( 343 -24 )]*6037

f' = 6491.194357 Hz

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