Earth's crust - a solid layer of the planet, located outside of the hot "insides" of the Earth, on which we are used to walking, traveling and living in general. The thickness of the earth's crust, compared with the other two layers of the earth, is negligible, but nevertheless it is possible to characterize what large elements the earth's crust consists of, as well as understand its composition
Science 2024, November
A beautiful feeling that drives people to do crazy things. Because of him, a lot happened in the history of mankind, up to the fact that wars were unleashed between countries. It would seem that a completely unearthly feeling that makes people flutter like butterflies, ex alts them to heaven, giving a feeling of happiness and extraordinary joy. But there was a look at love from the point of view of chemistry
Man has always dreamed of flying in the sky. Remember the story of Icarus and his son? This, of course, is just a myth and we will never know how it really happened, but this story fully reveals the thirst to soar in the sky
Substance CS: history of its discovery, physical and chemical properties. Impact on the human body. The use of the compound for military-political purposes. Environmental impact. Necessary measures in case of poisoning with chlorobenzalmalononitrile
The map of the starry sky is an incredibly attractive and fascinating sight, especially if it is a dark night sky. Against the backdrop of the Milky Way stretching along a hazy road, both bright and slightly hazy stars that make up various constellations are perfectly visible. One of these constellations, located almost entirely in the Milky Way, is the constellation Perseus
"Chlorhexidine" - what is it? The question is quite common, and today we will talk about this medical preparation
In a special section of physics - dynamics, when they study the movement of bodies, they consider the forces acting on the moving system. The latter can perform both positive and negative work. In this article, we will consider what the work of the friction force is and how it is calculated
What is a fish heart? Our article is devoted to this topic, in which we will tell you how many chambers a fish heart has and what function it performs
The object of numerous scientific studies and esoteric teachings, the inspirer of poets and romantics - all this is the full moon. Photos of the night star illustrate articles about space achievements and discoveries and at the same time about magic and superstitions. What is the full moon from the point of view of astronomy, what superstitions are associated with it and what are the results of studies that verify them - this will be discussed in the article
For their calculations, astronomers use special units of measurement that are not always clear to ordinary people. It is understandable, because if cosmic distances were measured in kilometers, then the number of zeros would ripple in the eyes. Therefore, to measure cosmic distances, it is customary to use much larger quantities: an astronomical unit, a light year, and a parsec
In the night sky in clear weather, you can see many small luminous lights - stars. In fact, their sizes can be huge and hundreds or even thousands of times larger than the size of the Earth. They can exist separately, but sometimes form a star cluster
The first principle of the laser, whose physics was based on Planck's law of radiation, was theoretically substantiated by Einstein in 1917. He described absorption, spontaneous and stimulated electromagnetic radiation using probability coefficients (Einstein coefficients)
The bottom (diaphragm) of the oral cavity is formed by many muscles located between the tongue and the hyoid bone. The structure of its mucous membrane is characterized by a high development of the submucosa, which includes fatty and loose connective tissues
Almost all Soviet people remember how the government in the 1980s frightened citizens with a terrible new weapon invented by "decaying capitalism". Political informants in institutions and teachers at school in the most terrible colors described the danger to all living things that the neutron bomb, adopted by the United States, poses
When preparing for the exam in mathematics, students have to systematize their knowledge of algebra and geometry. I would like to combine all the information, for example, how to calculate the area of a pyramid. Moreover, starting from the base and side faces to the area of the entire surface
Computers have opened up new horizons for recursion, but the classical consciousness of a qualified developer is not in all cases ready to realize them. Object-oriented ideas came to the world of information processing twice, but the first time information processing did not yet have hardware support, and the second time programming had already managed to burden itself with the classics of the genre
In this article we will pay attention to the concept of "social engineering". A general definition of the term will be considered here. We will also learn about who was the founder of this concept. Let's talk separately about the main methods of social engineering that attackers use
What is thermodynamics? This is a branch of physics that deals with the study of the properties of macroscopic systems. At the same time, methods of converting energy and methods of its transfer also fall under the study
Most of us are far from science and understand little about it, but does this prevent us from learning interesting scientific facts about the world that surrounds us? A lot of interesting, funny and amazing is hidden from our eyes
The full name of the educational institution is National Research University Higher School of Economics, abbreviated as NRU HSE. The unofficial name is the result of student folk art - "Tower". This university is in the top 5 best universities in the country and is rightly considered the most progressive and prestigious among the capital's institutions
Memory is one of the most important terms in psychology. We use this concept very often in everyday life. Memory in psychology is called mnemonic activity. This name has an interesting origin - after the name of the mother of the nine muses and the goddess of memory Mnemosyne
Portuguese Prince Enrique the Navigator made many geographical discoveries, although he himself went to sea only three times. He marked the beginning of the era of great geographical discoveries and significantly improved the position of Portugal
Biology is a term used to describe a whole system of sciences. It generally studies living beings, as well as their interaction with the outside world. Biology explores absolutely all aspects of the life of any living organism, including its origin, reproduction and growth
Collagen fibers play an important role in the human body. They are responsible not only for the elasticity of the skin, but also support the structure of internal organs. Today, collagen is also actively used in cosmetology. As a result, the skin looks younger and more attractive. In our article you can find more detailed information about collagen fibers and their functions
How to prepare a bleach stock solution for disinfection. The ratio of components and the rules for preparing compositions. Features of bleach and its disadvantages. Preparation procedure and safety precautions for use
In the article we will talk about Srinivasa Ramanujan, a famous mathematician from India. This man did a lot for this science, and besides, he is interesting for his biography. Everything you wanted to know about this man, read the article below
Chestnut soils are called soils, the condition for the formation of which are dry steppes. What properties do chestnut soils have, how they were formed, where they are distributed, read in this article
After reading this article, you will learn what forms, types and methods of observation exist. We are talking about their allocation in the statistics. We propose to first consider the types of observation that are used in this branch of knowledge. The need to choose a data collection option in it is determined by the fact that there are several types of observation
Finding the answer to the question of what a vacuum is is not as easy as it seems at first glance. This problem has worried scientists since ancient times, and even today there are several approaches that explain the physical side of this phenomenon
The structure of the atomic nucleus is one of the most fundamental issues of modern science. Constant experiments in this area have allowed scientists not only to determine with a high degree of accuracy what an atom is, but also to actively use the knowledge gained in various industries and in the creation of the latest weapons
The word "method" has Greek roots. Literally translated, it means "the path, following the path." An extended interpretation of the concept includes a set of actions, a sequence of steps or a set of techniques that are aimed at achieving a very specific task. That is, a set of targeted activities is a method. The definition of the word may change slightly when clarifications are made regarding the types and specifics of events, but, in general, the essence remains unchanged
Computer technology is developing extremely fast. There are new layouts and developments that must meet ever-increasing requirements. One of the most interesting things is the very large integrated circuit. What it is? Why does she have such a name? We know how VLSI stands for, but what does it look like in practice? Where are they used?
Any scientific field is based on a number of methods and mechanisms. Their totality is a separate doctrine, called the methodology of science. In the traditional sense, this is a section of the general theory of knowledge, one of the sections of philosophy. The content and concept of the methodology of science will be described in detail in our material
This article will focus on an essential enzyme found in the stomach of every mammal, including humans. General information about the enzyme pepsin, information about its isomers and the role of the substance in digestion will be considered
Soil science is one of the important modern sciences, the study of which is a necessary condition for the training of specialists in various sectors of the economy. It is studied not only by soil theorists, but also by ecologists, geographers, specialists in the development of deposits of various fossil resources, landscape architects and many others
Scientists have not been able to come to a consensus about who the ancestors of people are, debates in scientific circles have been going on for more than a century. The most popular theory of evolution was proposed by the famous Charles Darwin
One of the main tasks of the analysis of dynamic control systems is the solution of the problem of their stability. Their stability is one of the most important characteristics of the management concept. The system is considered unstable if it does not return to its original position, but continues to oscillate after it has undergone some change at the input, or is under the influence of an unwanted perturbation
Zoology is the science of animals that studies representatives of the corresponding genus (Animalia). This includes all types of organisms that eat food containing protein, carbohydrates and fats. Such species differ from plants in that they constantly synthesize organic substances necessary for life from certain sources
The immersion method of microscopic observation involves the introduction of a special liquid between the lens of the device and the object under study. It enhances brightness and expands the scope of image magnification
In terms of anti-scientific, idealistic understanding of history, certain forms of consciousness, ideas, religious or moral concepts, legal or political theories act as the basis of social life. The social structure, economic relations and the development of civilization as a whole are thus declared to be dependent on them. However, at a certain historical stage, this concept was opposed by another doctrine