Standing on the sidewalk next to your parked vehicle you, Physics

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Standing on the sidewalk next to your parked vehicle you

Standing on the sidewalk next to your parked vehicle you hear the siren of an approaching fire engine. The transmittal frequency of the approaching fire engine is 1200 Hz but you hear a frequency of1363 Hz. It is a very hot day with the air temperature at100F.

1. Evaluate the velocity of sound in air?

2. Determine the speed of the approaching fire engine? in km/h

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