Nicolas Leonard Sadi Carnot, French Physicist

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Nicolas Leonard Sadi Carnot (1796-1832) was a French military engineer who, in his 1824 Reflections on the Motive Power of Fire, gave the first successful theoretical account of heat engines, now known as the Carnot cycle, thereby laying the foundations of the second law of thermodynamics. He is often described as the "Father of thermodynamics", being responsible for such concepts as Carnot efficiency, Carnot theorem, Carnot heat engine, and others. His name is one of the 72 names inscribed on the Eiffel Tower.

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