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Two trains (on separate tracks) travel toward each other, the first at 60.0 km/s and the...

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Physics

Two trains (on separate tracks) travel toward each other, thefirst at 60.0 km/s and the second at 40.0 km/s. Both turn on theirwhistle, the first one emitting a frequency of 200 Hz and thesecond one emitting a frequency of 220 Hz. What frequencies do theyeach receive if the speed of sound in air is 330 m/s? Hint: Draw adiagram or do this one in steps. Is the source or the observermoving?

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