Shoe upper und heat pump: was sie gemeinsam haben

1. Schritt 1. Shoe upper — ist Teil von — Footwear. The upper blank.
2. Schritt 2. Footwear — ist hergestellt aus — Leather. Leather.
3. Schritt 3. Leather — ist Material für — Piston. They were sealed with a leather cup.
4. Schritt 4. Piston — ist Teil von — Watt steam engine. Steam pushes the piston in the cylinder.
5. Schritt 5. Watt steam engine — inspirierte — Thermodynamics. Carnot wrote “Reflections on the Motive Power of Fire” trying to understand steam engines.
6. Schritt 6. Thermodynamics — wird verwendet in — Heat pump. A heat pump moves heat from cold to warm by spending work — by the laws of thermodynamics.

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