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Dynastic cycle (traditional Chinese: 朝代循環; simplified Chinese: 朝代循环; pinyin: Cháodài Xúnhuán) is an important political theory in Chinese history. According to this theory, each dynasty of China rises to a political, cultural, and economic peak and then, because of moral corruption, declines, loses the Mandate of Heaven ...
The book describes the general pattern of the official dynastic histories with regard to the structure, method, arrangement, sequence, caption, and commentary, dating back to the Warring States period. The Zizhi Tongjian was a pioneering reference work of Chinese historiography.
Although he did not live to see the Zhou conquest of Shang, his legitimacy passed to his heirs. [20] Early on in the dynasty, there was some debate as to whether Heaven's mandate had fallen to the senior sons of King Wen's line, or to the house of Zhou as a group, as exemplified by an exchange surviving in the classic Book of Documents. [21]
The nuclear fuel cycle, also called nuclear fuel chain, is the progression of nuclear fuel through a series of differing stages. It consists of steps in the front end , which are the preparation of the fuel, steps in the service period in which the fuel is used during reactor operation, and steps in the back end , which are necessary to safely ...
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 ...
Drawing the retorts at the Great Gas Establishment Brick Lane, from The Monthly Magazine (1821). The history of gaseous fuel, important for lighting, heating, and cooking purposes throughout most of the 19th century and the first half of the 20th century, began with the development of analytical and pneumatic chemistry in the 18th century.
Teenagers are inhaling canisters of nitrous oxide sold under the brand name Galaxy Gas The brightly colored canisters are used to make airy whipped creams, but can cause “life-threatening health ...
How much gas is present could be specified by giving the mass instead of the chemical amount of gas. Therefore, an alternative form of the ideal gas law may be useful. The chemical amount, n (in moles), is equal to total mass of the gas (m) (in kilograms) divided by the molar mass, M (in kilograms per mole): =.