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Problem 5.14.12. ENGINEERING / ACOUSTICS: Sound speed in air varies linearly from 343 m / s...

Problem 5.14.12. ENGINEERING / ACOUSTICS:

Sound speed in air varies linearly from 343 m / s at the ground to 3/5/3 m / s at 100 m altitude, and decreases above this. For a source at ground level, find (a) the maximum elevation angle for a ray that returns to ground level, and (b) the range at which this ray returns to ground level.

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