Centrifuge and cannon: what they have in common

1. Step 1. Centrifuge — uses — Centrifugal effect. Separation by density.
2. Step 2. Centrifugal effect — is used in — Centrifugal governor. The weights spread apart as the speed rises.
3. Step 3. Centrifugal governor — is part of — Watt steam engine. Watt used a centrifugal governor to keep the speed steady.
4. Step 4. Watt steam engine — is part of — Ironclad. Steam engines.
5. Step 5. Ironclad — has part — Cannon. Artillery.

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