Science

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Complex numbers: definition and basic concepts
The uncertainty of solving a quadratic equation on the entire field of real numbers led to the concept of an imaginary unit. This gave impetus to the development of mathematics. Algebra began to operate with the concept of a complex number. It turned out that all the laws applicable to real numbers apply to the new concept of the set of complex numbers. The article presents the basic concepts and definitions on the topic
› Boyarynya Morozova is a legendary person. The story of the life of the noblewoman Morozova
› Olonets province: history of Olonets province
› Chestnut soils, their properties and classification
› Natural zoning. Latitudinal and altitudinal zoning
› Romulus Augustulus and the fall of the Western Roman Empire
› The Senate of the Roman Empire: history
› Who was the first emperor of Rome?

Quantum numbers and their physical meaning
Much in quantum mechanics remains beyond understanding, much seems fantastic. The same applies to quantum numbers, the nature of which is still mysterious today. The article describes the concept, types and general principles of working with them
› Audio frequency range. The relationship between the frequency of a sound wave, its length and speed
› Noise is Industrial noise and its impact on humans
› Experiment of Michelson and Morley
› Boris Chertok, Soviet and Russian design scientist: biography, works
› B. A. Dzhanibekov, cosmonaut: biography, nationality, photo, paintings, Dzhanibekov effect
› On the heads Or what else was the judge's gavel used for
› A good joke is: 3 secrets of funny jokes

Actual Problems of Criminal Law (APUP)
Actual problems of criminal law lie in conflicts between state institutions. Corruption as an actual problem of Russian criminal law
› Red Army: creation. The history of the creation of the Red Army
› The settlement of the Slavs in Europe in the early medieval period
› The invention of radio: so who was the first?
› Alexander Popov: radio and other inventions. Biography of Alexander Stepanovich Popov
› Who invented the radio? When did Popov invent the radio?
› Evolution of mammals: description, steps, classes
› Who invented television and in what year?