and the speed of sound in air is

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A locomotive approaching a crossing at a speed of 80 mi/h sounds a whistle of frequency 400 Hz when 1 mi from the crossing. There is no wind, and the speed of sound in air is
08
Nov
A locomotive approaching a crossing at a speed of 80 mi/h sounds a whistle of frequency 400 Hz when 1 mi from the crossing. There is no wind, and the speed of sound in air is A locomotive approaching a crossing at a speed of 80 mi/h sounds a whistle of frequency 400 Hz when [...]
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