Bobsleigh and radar: what they have in common

1. Step 1. Bobsleigh — has part — Steering wheel. A steering wheel.
2. Step 2. Steering wheel — is part of — Car. A steering wheel.
3. Step 3. Car — has part — Car radio. A car radio.
4. Step 4. Car radio — uses — Electromagnetic waves. It receives radio waves.
5. Step 5. Electromagnetic waves — is used in — Radar. Radio waves reflect off the target.

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