Education, self-education and personal growth - methods, lessons

Temperament (lat. temperamentum - "stable mixture of components") - a stable set of individual psychophysiological characteristics of a person associated with dynamic, rather than meaningful aspects of activity. Temperament is the basis for the formation and development of character. From a physiological point of view, it is due to the type of higher nervous activity of a person and manifests itself in the nature of a person’s behavior, in the degree of his vital activity

Eastern Slavs are a cultural and linguistic community of Slavs who speak East Slavic languages. The tribal unions of the Eastern Slavs, who, according to most scientists, managed to merge into a single nationality, made up the main population of the medieval Old Russian state. As a result of the subsequent political stratification of the Eastern Slavs, by the 17th century three peoples had formed (in decreasing order of numbers): Russian, Ukrainian, Belarusian

Naphthenic acids (NA) are a mixture of several cyclopentyl and cyclohexylcarboxylic acids with a molecular weight of 120 to 700 or more atomic mass units. The main fraction are carboxylic acids with a carbon skeleton from 9 to 20 carbon atoms. Scientists claim that naphthenic acids (NA) are cycloaliphatic carboxylic acids with 10-16 carbon atoms, although acids containing up to 50 carbon atoms have been found in heavy oils

Goldbach's problem is one of the oldest and most hyped problems in the history of all mathematics. This conjecture has been proven to be true for all integers less than 4 × 1018, but remains unproven despite considerable efforts by mathematicians