Motion sensor and pneumatic tube: what they have in common

1. Step 1. Motion sensor — is part of — Burglar alarm. Motion sensors.
2. Step 2. Burglar alarm — has part — Electromagnet. A bell.
3. Step 3. Electromagnet — includes — Superconducting magnet. An electromagnet.
4. Step 4. Superconducting magnet — is part of — Maglev. Japan’s SCMaglev uses superconducting magnets.
5. Step 5. Maglev — evolved into — Hyperloop (concept). It develops the idea of magnetic levitation.
6. Step 6. Hyperloop (concept) — was inspired by — Pneumatic tube. Capsules in a tube — pneumatic post for people.

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