World 5 · Doppler and the Sound Barrier · 11 min · PRO
The Doppler effect
The passing ambulance
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.
PRO includes
- All 60 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly