Driving down a quiet street on a summer day with the car windows down, you see...

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Physics

Driving down a quiet street on a summer day with the car windowsdown, you see a convertible
approaching from the opposite direction, with the driver playingher car stereo loudly. Having a
well-trained musician’s ear, you notice that the song you hear isin a key one semitone (the
interval between two adjacent keys on a piano) above the key inwhich the song is typically
heard. You also know that to shift any note by one semitone, thefrequencies must be related by
a factor of 1.06. Assume both drivers are traveling at the samespeed, what is their speed?

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