Posted by **Patty** on Sunday, February 3, 2013 at 3:33pm.

A car sounding its horn (rated by the manufacturer at 600 Hz) is moving at 20 m/s toward the eat. A stationary observer is standing due east of the oncoming car.

a) What frequency will he hear assuming that the speed of sound is 343 m/s?

b) What if the observer is standing due west of the car as it drives away?

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