On this day, 193 years ago, August 24, 1832 (July 29, 1832 in the lunar calendar), French physicist Nicolas Cano passed away. Nicolas Léonard Sadi Carnot (1796-August 24, 1832) was a French physicist and engineer. Have made certain contributions in heat. He proposed the Carnot Cycle and Carnot Theorem in 1824, which were an important basis for the later establishment of the Second Law of Thermodynamics. Carnot cycle is the most ideal cycle for a heat engine. Made outstanding contributions to thermodynamics in physics