Yoke und heat pump: was sie gemeinsam haben

1. Schritt 1. Yoke — wird verwendet in — Plough. It was pulled by oxen in a yoke.
2. Schritt 2. Plough — entwickelte sich zu — Steel plough. A steel share.
3. Schritt 3. Steel plough — wird verwendet in — Tractor. Ploughing with a tractor.
4. Schritt 4. Tractor — entwickelte sich aus — Watt steam engine. The first tractors were steam-powered.
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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