2. A car moving at 24 m/s sounds a 500 Hz horn when the temperature of the air is 26 celsius. A person at the side of the highway hears the horn as the car is approaching and while it is moving away. a) Describe what will happen to the frequency of the sound detected by the person as the car approaches and then passes the person. b) Calculate the two frequencies. Indicate which frequency occurs when the car is approaching the person and which one occurs when the car is moving away.

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