Science

In Russian legislation there is a fairly clear definition explaining what education is. It should be understood as a purposeful process of training and education in human, public and state interests. Last modified: 2025-01-23 12:01

Complete and incomplete transformation of insects determines the difference in their development and life. This is especially true of development and adaptation to adverse conditions. Insects with complete transformation will be discussed in our article. Last modified: 2025-01-23 12:01

Leonhard Euler is a Swiss mathematician and physicist, one of the founders of pure mathematics. He not only made fundamental and formative contributions to geometry, calculus, mechanics, and number theory, but also developed methods for solving problems in observational astronomy and applied mathematics to engineering and public affairs. Last modified: 2025-01-23 12:01

Kepler's name today is among the greatest minds whose ideas underlie both current scientific and technical achievements. An asteroid, a planet, a lunar crater, a space truck, and an orbiting space observatory are named after him. Last modified: 2025-01-23 12:01

Planet Earth is special in many respects. And the point is not only that it has developed life, but also that it helps this life to persist for many millions and even billions of years. And the main reason for this is the favorable support of the cosmos. Last modified: 2025-01-23 12:01

Types of chromatography can be classified according to various criteria: the state of aggregation of phases, the physicochemical nature of the interaction of the sorbent and sorbates, the method of introducing the eluent and its movement, the analysis technique, the purpose of chromatography. Last modified: 2025-01-23 12:01

What to do with a child when it's raining outside? You can do boring science! Experiences that both adults and children will enjoy. Last modified: 2025-01-23 12:01

What is light? This question has interested mankind in all ages, but only in the 20th century AD, much was clarified regarding the nature of this phenomenon. This article will focus on the corpuscular theory of light, its advantages and disadvantages. Last modified: 2025-01-23 12:01

The parameter Young's modulus, or the modulus of longitudinal elasticity, is necessary in various calculations to obtain an indicator of the stiffness of materials under tensile-compressive deformations, as well as in bending, which is quite often used in stability calculations. Last modified: 2025-01-23 12:01

More than two thousand years ago, myths and legends were composed about Olympia, it was glorified by philosophers, historians and poets. It was famous for its holy places, temples of Zeus and Hera, historical monuments, the construction of which dates back to the 2nd millennium BC. Later, in honor of the Olympic Games, various structures were built and numerous statues were erected, including the famous majestic statue of Zeus. It was here that tens of thousands of inhabitants of Hellas gathered. Last modified: 2025-01-23 12:01

Segregation is a term derived from the Latin word segregatio. Literally, it translates as "separation", or "restriction". Segregation can be of various types - they will be discussed in the article. In addition, the question of gender segregation and the degree of its influence on the professional and especially the political sphere will be raised. Last modified: 2025-01-23 12:01

Many outstanding scientists contributed to sociology, one of them was Pierre Bourdieu. French citizen, born in 1930, philosopher, culturologist, author of the theoretical concept of social space, field, cultural and social capital. He believed that the place of the subject in the social space determines the economic capital, which can be considered in terms of cultural, social and symbolic assets. Last modified: 2025-01-23 12:01

The midbrain, the functions and structure of which we will consider in detail, develops mainly under the influence of the visual receptor in the process of phylogenesis. Therefore, its most important formations are related to the innervation of the eye. Last modified: 2025-01-23 12:01

In the article we will define the striopallidary system, look at its structure, as well as the key differences between its striatum and pallidum. Next, we will follow it in the evolutionary process, consider how it manifests itself in learning movements, and get acquainted with its physiology. We will devote a separate section to functions. The description of the syndromes of lesions of the striopallidary system will complete the article. Last modified: 2025-01-23 12:01

The greatest achievement of evolution is the brain and the developed nervous system of organisms, with an increasingly complex information network based on chemical reactions. A nerve impulse running along the processes of neurons is the quintessence of complex human activity. An impulse arises in them, it moves along them, and it is the neurons that analyze them. The processes of the neuron are the main functional part of these specific cells of the nervous system, and they will be discussed. Last modified: 2025-01-23 12:01

In the modern world, special terms are used to measure length, volume, weight. The values of these physical quantities are clearly defined in established units. Before the advent of regulated standards, old units of measurement were used to determine sizes. Last modified: 2025-01-23 12:01

An ordinary person who is not associated with chemistry and medicine, as a rule, has a vague idea of the importance of cob alt for his life and he alth. Another reason why we find it difficult to explain what cob alt is is its scarce distribution in nature. Only 0.004% - this is its content in the earth's crust. However, the metal and its compounds are actively used in metallurgy, agriculture and medicine. Last modified: 2025-01-23 12:01

There is hardly a person in our time who has not seen films about Sherlock Holmes or read books about how he deftly and quickly unravels the most complex incidents. Attention to detail and the method of deduction is the main secret of the success of this famous detective. Of course, the way the popular hero A. Conan Doyle builds his conclusions is a real talent and rare skill. Last modified: 2025-01-23 12:01

The universe is constantly expanding, space objects are gradually moving away from us, but not all. Scientists have established the approach of the huge Andromeda galaxy to our Milky Way at a speed of 120 km / s. Projects for the collision of galaxies have already been drawn up. Last modified: 2025-01-23 12:01

Natural water is exactly the environment where numerous microorganisms intensively reproduce, and therefore the microflora of water will never cease to be the object of close attention of man. How intensively they reproduce depends on many factors. Last modified: 2025-01-23 12:01

In the modern world, with a wide variety of he althy and unhe althy food presented in supermarket windows, it became necessary to study the effect of certain products on the human body. Last modified: 2025-01-23 12:01

Centrifugation is a method of separating various heterogeneous mixtures into separate components. The operation is performed due to the impact on substances by centrifugal force. In what areas of activity resort to this method? For what purpose can it be used? We will talk about this and much more in the presented material. Last modified: 2025-01-23 12:01

The main periods of the development of life on Earth, a table of the development of life on Earth, climate change and living organisms. Last modified: 2025-01-23 12:01

The anatomy of the knee joint is quite complex. This articulation in the human body is made up of many parts. The connection takes on the most difficult loads, distributing a weight several times greater than its own. Last modified: 2025-01-23 12:01

Vitamins are organic substances that (mostly) are not synthesized in the human body (or are formed in small quantities), so they are indispensable in the diet. There are 20 known vitamins that affect human he alth. The amount of consumption depends on the sex, age and level of physical activity of the person. Last modified: 2025-06-01 07:06

It is possible to use wheels (gears) of various configurations in the planetary mechanism. Suitable standard with straight teeth, helical, worm, chevron. The type of engagement will not affect the general principle of operation of the planetary mechanism. The main thing is that the axes of rotation of the carrier and the central wheels coincide. But the axes of the satellites can be located in other planes (crossing, parallel, intersecting). Last modified: 2025-01-23 12:01

What is partial discharge and what causes it. The results of the impact of partial discharge on the insulation of power equipment and methods for monitoring the state of its structure. Last modified: 2025-01-23 12:01

The sacral plexus (Latin name - plexus sacralis) is formed by the abdominal branches of the fourth and fifth lumbar and spinal sacral nerves. Features of the structure and anatomy of the sacral plexus. Last modified: 2025-01-23 12:01

Today we will talk about such a great scientist as Andreas Vesalius. You will find a photo and biography of him in this article. If you can consider someone the father of anatomy, then, of course, Vesalius. This is a naturalist, creator and founder of modern anatomy. He was one of the first to study the human body through autopsy. It is from him that all later achievements in anatomy originate. Last modified: 2025-01-23 12:01

Together with the bones, the muscles are the backbone of the body. In our body, they are present everywhere, even on the head. What muscles exist? What is the main function of facial muscles? Learn more about it further. Last modified: 2025-01-23 12:01

Reflex is the body's response to internal or external irritation, carried out and controlled by the central nervous system. The first scientists who developed ideas about human behavior, which had previously been a mystery, were our compatriots I.P. Pavlov and I.M. Sechenov. Last modified: 2025-01-23 12:01

The shape of the human skull in octogenesis undergoes significant changes. During fetal development and in newly born children, the skull is more rounded, due to the fact that the brain is more developed in it and a larger volume of the cranium is required to accommodate it. The shape of the skull changes as the teeth grow and the masticatory muscles become fixed. Last modified: 2025-01-23 12:01

The laws of thermodynamics and perpetual motion. Perpetum mobile of the first and second kind. The impossibility of the existence of a perpetual motion machine according to the laws of thermodynamics. The history of the creation of a perpetual motion machine: famous projects. Thought experiments. Is there any hope of creating a perpetual motion machine?. Last modified: 2025-01-23 12:01

Today, natural gas is the most important source of energy. All gaseous combustible compounds from the bowels of the earth are odorless, contain many impurities that affect the density of natural gas. Last modified: 2025-01-23 12:01

In this article we will get acquainted with the concept of reservoir pressure (RP). Here questions of its definition, value and a way of operation by the person will be mentioned. The concept of anomalous reservoir pressure, the accuracy of the measuring capabilities of the equipment and some individual concepts related to the dominant in this text will also be touched upon. Last modified: 2025-01-23 12:01

Historical study of the concept of elasticity. Modulus of elasticity, or Young's modulus, its definition, physical nature and importance of consideration in the design of structures. Typical values of the physical quantity for wood and metal systems. Last modified: 2025-01-23 12:01

Feathers are not only decoration for birds. They give warmth, the ability to fly, find a mate during the mating season, hatch offspring and hide from predators. Consider the types of feathers and their structure. Last modified: 2025-01-23 12:01

Even in ancient times, observing the starry sky, people noticed that during the day the sun, and in the night sky - almost all the stars - repeat their path from time to time. This suggested that there were two reasons for this phenomenon. Either the Earth rotates around the Sun against the background of a fixed starry sky, or the sky rotates around the Earth. Last modified: 2025-01-23 12:01

If we paraphrase the well-known expression "movement is life", it becomes clear that all manifestations of living matter - growth, reproduction, processes of synthesis of nutrients, respiration - are, in fact, the movement of atoms and molecules that make up the cell . Are these processes possible without the participation of energy? Of course not. Last modified: 2025-01-23 12:01

The material proposes a presentation of the main postulates related to parallelism in Euclidean and non-Euclidean geometries. Last modified: 2025-01-23 12:01