World 5 · Doppler and the Sound Barrier · 12 min · PRO
Doppler numbers
f' = f × c / (c ∓ v)
PRO · Acoustics Studio
World 5: Doppler and the Sound Barrier is part of PRO
The first world of Acoustics Studio is free. PRO opens the other 20 lessons in 5 worlds — simulations, quizzes and all.
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