uring a hurricane, a 1,200 Hz warning siren on the town hall punds. The wind is blowing at 55 m/s in a direction from the siren oward a person 1 km away. With what frenuency does the sound ave reach the person? (The speed of sound in air is 330 m/s.) 1,030 Hz. 1,400 Hz. 1,200 Hz. O 1,000 Hz. 1,440 Hz.
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