Quantum mechanics and archimedes’ screw: what they have in common

1. Step 1. Quantum mechanics — is used in — Superfluidity. A quantum phenomenon.
2. Step 2. Superfluidity — uses — Helium. Liquid helium.
3. Step 3. Helium — is used in — Airship. After the Hindenburg — helium.
4. Step 4. Airship — has part — Propeller. Air propellers.
5. Step 5. Propeller — evolved from — Archimedes’ screw. The first propellers by Smith and Ericsson were a variation on the Archimedes’ screw.

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