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The law is called conservation of energy; it states that there is a certain quantity, which we call energy that does not change in manifold changes which nature undergoes. That is a most abstract idea, because it is a mathematical principle; it says that there is a numerical quantity, which does not change when something happens.
The history of thermodynamics is a fundamental strand in the history of physics, the history of chemistry, and the history of science in general. Due to the relevance of thermodynamics in much of science and technology, its history is finely woven with the developments of classical mechanics, quantum mechanics, magnetism, and chemical kinetics, to more distant applied fields such as ...
Although a majority of the renewable energy in China is from hydropower, other renewable energy sources are in rapid development. In 2006, a total of 10 billion US dollars had been invested in renewable energy, second only to Germany. [57] China is a major source of clean energy technology transfer to other developing countries.
Chen prime: A prime number p is called a Chen prime if p + 2 is either a prime or a product of two primes (also called a semiprime). The even number 2p + 2 therefore satisfies Chen's theorem. The Chen primes are named after Chen Jingrun, who proved in 1966 that there are infinitely many such primes.
[90] [85] Germany approved plans to close all its reactors by 2022 (Following the energy crisis caused by the Russian invasion of Ukraine, Germany now plans to keep reactors running until April 2023 [91]). Italian nuclear energy plans [92] ended when Italy banned the generation, but not consumption, of nuclear electricity in a June 2011 referendum.
China is the world's leader in electricity production from renewable energy sources, with over triple the generation of the second-ranking country, the United States.. China's renewable energy sector is growing faster than its fossil fuels and nuclear power capacity, and is expected to contribute 43% of global renewable capacity grow
Founded by the Manchus, it was the second conquest dynasty to rule the entirety of China proper, and roughly doubled the territory controlled by the Ming. The Manchus were formerly known as Jurchens , residing in the northeastern part of the Ming territory outside the Great Wall.
China faces a problem with air quality as a consequence of industrialization. China ranks as the second largest consumer of oil in the world, and "China is the world's top coal producer, consumer, and importer, and accounts for almost half of global coal consumption.”, [55] as such their CO 2 emissions reflect the usage and production of ...