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Two semi-trucks are moving toward each other at 31.9 m/s relative to the ground (meaning this...

Two semi-trucks are moving toward each other at 31.9 m/s relative to the ground (meaning this is the speed of each truck with respect to the ground). One truck is honking its horn that has a frequency of 530 Hz.

(a) What frequency is heard by the driver of the other truck when there is no wind?

(b) What frequency is heard by the driver of the other truck when the wind is blowing at 31.9 m/s toward the horn and away from the listener?

(c) What frequency is heard if the wind direction is reversed? (Take the speed of sound to be 343 m/s.)

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