Airbag and sonar: what they have in common

1. Step 1. Airbag — has part — Accelerometer. The crash sensor is an accelerometer.
2. Step 2. Accelerometer — is part of — Electric unicycle. Tilt sensors.
3. Step 3. Electric unicycle — uses — Gyroscope. Gyro sensors feel the lean, and the wheel rolls to keep the rider up.
4. Step 4. Gyroscope — is part of — Torpedo. Obry’s gyroscope keeps the course.
5. Step 5. Torpedo — is part of — Destroyer. Torpedoes.
6. Step 6. Destroyer — has part — Sonar. Underwater acoustics.

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