The general theory of relativity is not only one of the most outstanding achievements of human thought. Without applications of this theory, it is difficult to imagine modern communications and means of global positioning. Last modified: 2025-01-23 12:01
Science
Due to the diversity of natural phenomena over the course of many millennia, separate scientific directions have been formed in their study. When scientists discovered new properties of matter, new sections within each direction were opened. Thus, a whole system of knowledge was formed - the sciences that study nature. Last modified: 2025-01-23 12:01
Sulfur pyrite (aka pyrite) is the most common sulfide mineral in the earth's crust. What is interesting about this stone? What are its physical properties? Is it used in any branches of modern industry? We will try to answer all these questions in our article. Last modified: 2025-01-23 12:01
In the article we will talk about woody plants. We will learn everything we can find on this topic. Tree and shrub plants will be considered in detail and at all levels. The article will be useful for both experienced people and beginners. Last modified: 2025-01-23 12:01
The article discusses the nature and causes of condensate. The methods for calculating the dew point, as well as the instruments by which it is determined, are given. The influence of dew point calculation in construction on the quality and durability of buildings was studied. Last modified: 2025-01-23 12:01
In the article, from the point of view of logic, the concept of inference is considered, its types are defined. Deductive ways of thinking are studied in more detail, as well as ways to help develop deduction in oneself. Last modified: 2025-01-23 12:01
Breeding allows you to develop new varieties. Individual and mass selection of plants allows you to select only those specimens that meet all the goals. Last modified: 2025-01-23 12:01
Classes of adjectives are large lexical and grammatical groups of words of a given part of speech. The classification is based on the difference in the meaning and method of manifestation of the non-procedural feature of the subject. In modern Russian, adjectives are divided into qualitative, relative and possessive. Read more about each category below. Last modified: 2025-01-23 12:01
On his earthly path, a person overcomes several life periods. Each of them has features, positive and negative sides. Both ancient thinkers and scientists devoted their time to the study of age periods. Last modified: 2025-01-23 12:01
Analytic function of a real variable is a function that coincides with its Taylor series in the vicinity of any point of the domain of definition. Last modified: 2025-01-23 12:01
If you ask any educated person about who discovered penicillin, then in response you can hear the name Fleming. But if you look into Soviet encyclopedias published before the fifties of the last century, you will not find this name there. Instead of a British microbiologist, the fact is mentioned that the Russian doctors Polotebnov and Manassein were the first to pay attention to the healing effect of mold. Last modified: 2025-01-23 12:01
Sound waves, affecting the human eardrum, cause the hairs to vibrate. The amplitude of these sound vibrations is directly related to the perceived loudness of these waves - the larger it is, the louder the sound will be felt. Last modified: 2025-06-01 07:06
Compare the efficiency of a rail train and a flying saucer. The difference between them is comparable to the difference between a man dragging a bag of cargo on the ground and a hovercraft. The creation of an air cushion has already happened, but will the creation of a flying saucer happen?. Last modified: 2025-01-23 12:01
Lev Landau (years of life - 1908-1968) - the great Soviet physicist, a native of Baku. He owns a lot of interesting research and discoveries. Can you answer the question, why did Lev Landau receive the Nobel Prize? In this article we will talk about his achievements and the main facts of his biography. Last modified: 2025-01-23 12:01
Every organism, from small bacteria to mammals, is made up of chemical compounds. Almost the entire periodic table can be found in our body, which indicates the importance of many chemical elements. What is the biological role of phosphorus and nitrogen? Where are they found most often?. Last modified: 2025-01-23 12:01
The cell of any organism is one big factory for the production of chemicals. Here reactions take place in the biosynthesis of lipids, nucleic acids, carbohydrates and, of course, proteins. What is the role of the cytoplasm in protein synthesis?. Last modified: 2025-01-23 12:01
The structural unit of any organism is a cell. The definition of this structure was first used by Robert Hooke when he studied the structure of tissues under a microscope. Cells of multicellular organisms form tissues, which, in turn, are a component of organs and organ systems. Last modified: 2025-01-23 12:01
What are genotypes? The term refers to the totality of genes of one organism, which are stored in the chromosomes of each of its cells. What is the difference between genotype and phenotype?. Last modified: 2025-01-23 12:01
The variety of antibodies in our body predetermines the variability of humoral immunity functions. The structure of immunoglobins of each class has its own distinctive characteristics, according to which it is easy to guess about their role in the immune system. Last modified: 2025-01-23 12:01
Reverse transcription (abbreviated as RT) is a specific process characteristic of most RNA viruses. Its main feature is the synthesis of a double-stranded DNA molecule based on messenger RNA. Last modified: 2025-01-23 12:01
Reproduction is the ability of organisms to reproduce their own kind. Reproduction is one of the key features of all living things, so it is necessary to understand the biological significance of fertilization. Last modified: 2025-01-23 12:01
Quaternary structure is the structure of proteins, which is designed to contribute to the performance of vital functions in a living organism. The complex conformation of organic molecules allows, first of all, to influence the work of many metabolic processes. Last modified: 2025-06-01 07:06
Light and its penetration are of great importance in the life of reservoirs. The life of plants and organisms depends on it. The further the light penetrates into the water column, the deeper the plants will grow. Lighting depends on various external factors, for example, at sunset, less penetration of light under the layers of water than at noon, in the north, rays will penetrate less than in the south, etc. Last modified: 2025-01-23 12:01
The value is considered as one of the foundations of mathematics and geometry. This concept goes deep into the past. It was described in the III century. BC e. the ancient Greek mathematician Euclid in his work "Beginnings". These concepts were used by people for two thousand years, until the quantities were subjected to a number of generalizations. Last modified: 2025-01-23 12:01
The physical world is all around us. Its laws underlie everything we can see and feel. The purpose of this article is to reveal the topic of thermal phenomena and formulas of thermal processes, to explain their application using the example of modern technologies. Last modified: 2025-01-23 12:01
Let's consider the classification of management models, their features, the principle of construction, the specifics of application. Last modified: 2025-01-23 12:01
The functional approach is used in various sciences. Its definition comes from the interpretation of the function of each of the branches of knowledge. The variety of interpretations of the functional method allows it to be actively used in everyday life. Last modified: 2025-01-23 12:01
An adaptive system is a set of interacting or interdependent entities, real or abstract, that form a coherent whole, which together are able to respond to changes in the environment or changes in the interacting parts in a manner analogous to either continuous physiological homeostasis or evolutionary adaptation in biology. Last modified: 2025-01-23 12:01
Europe's demographics are undergoing huge changes in our time. According to some forecasts, the population of Europe in the middle of this century will be predominantly Islamic. Last modified: 2025-01-23 12:01
Since ancient times, people have used various types of letters to share information with their own kind. Archaeologists have found such messages on clay tablets, pieces of birch bark, or on parchment. This is a clear confirmation that a person has always tried to express his own thoughts and aspirations through writing. Last modified: 2025-01-23 12:01
Philosophy, as a seasoning of all things, is trying to understand what is impossible to understand and explain at the current level of development of science, or simply there is no need. Last modified: 2025-01-23 12:01
The article talks about the definition of time in various fields of science, what it is and how it can be relative. Last modified: 2025-01-23 12:01
Science and morality seem to be incongruous things that can never cross. The first is a whole series of ideas about the surrounding world, which can in no way depend on human consciousness. The second is a set of norms that regulate the behavior of society and the consciousness of its participants, which should be built taking into account the existing confrontation between good and evil. However, they have points of intersection. Last modified: 2025-01-23 12:01
Christian von Wolff (1679-1754) was a rationalist philosopher of the German Enlightenment. The list of his works includes more than 26 titles, covering more than 42 volumes, relating primarily to such areas as mathematics and philosophy. He is often considered the central historical figure that links the philosophical systems of Leibniz and Kant. Last modified: 2025-01-23 12:01
Technological revolution is a term used to describe a period when one or more technologies are replaced by another technology in a short period of time. This is an era of accelerated technological progress, characterized by innovation, the rapid application and dissemination of which cause dramatic changes in society. Last modified: 2025-01-23 12:01
What would happen to the world if an unknown force were in the power of man, capable of predicting the future events of any living organism or physical component for thousands of years to come? Probably, a World War would have begun for the right to possess this power, and a country that had acquired new opportunities would have become the head of the entire planet. Last modified: 2025-01-23 12:01
From time immemorial, people have experienced burning wood. And since then, wood has been used as the main type of fuel, which is used to heat various rooms and cook food. Despite the variety of combustible substances, wood remains a common fuel in the 21st century due to its low cost, availability and ease of handling. Last modified: 2025-06-01 07:06
Ontogeny, or the individual development of an organism, is a complex process, which is influenced by various factors. What can be the cause of ontogeny, what are its main stages?. Last modified: 2025-01-23 12:01
The most important functions of pedagogy are associated with the knowledge of the laws governing the upbringing, education and training of the individual and the development of optimal means for solving the main tasks of a person's personal development. Last modified: 2025-01-23 12:01
Three-dimensional space is a geometric model of the world in which we live. It is called three-dimensional because its description corresponds to three unit vectors having a direction in length, width and height. Last modified: 2025-01-23 12:01