Tape measure und mechanical clock: was sie gemeinsam haben

1. Schritt 1. Tape measure — umfasst — Tailor’s tape. A measuring tape.
2. Schritt 2. Tailor’s tape — nutzt — Euclidean geometry. A scale is marked on the tape.
3. Schritt 3. Euclidean geometry — wird verwendet in — Sundial. The scale is marked by the angle of the shadow.
4. Schritt 4. Sundial — funktioniert wie — Water clock (clepsydra). Two ancient ways to measure time: by a shadow and by flowing water.
5. Schritt 5. Water clock (clepsydra) — entwickelte sich zu — Mechanical clock. Mechanical clocks replaced water clocks, swapping the flow of water for an escapement.

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