Among the invertebrate organisms inhabiting our planet, animals stand out, which are combined into the Type Arthropods. Crustaceans are one of the superclasses of this taxon, whose representatives live mainly in fresh or sea water. Last modified: 2025-01-23 12:01
Krasnodar Territory is a unique region of our country. It is located at the junction of climatic zones, historical civilizations and national cultures. It is about the peoples and traditions of the region that will be discussed further. Last modified: 2025-06-01 07:06
Saturn's moons: Enceladus, Titan, Dione, Tethys and others - differ in size, shape and structure. Large and icy moons coexist with small and rocky ones. One of the most interesting objects in this system is Enceladus. Research suggests Saturn's sixth largest moon has a subsurface ocean. Last modified: 2025-01-23 12:01
His earthly existence came to an end in 2008, but the discussions generated by his books around the world will not subside for a very long time. Last modified: 2025-01-23 12:01
An optical microscope, often referred to as a light microscope, is a type of device that uses a large number of visible light sources. Optical microscopes are the oldest types and were invented in their current sophisticated form in the 17th century. Basic optical microscopes can be very simple Often used in the classroom and environments that require closer viewing. Last modified: 2025-01-23 12:01
The Gauss method frightens many with its belonging to such a branch of mathematics as linear algebra, which is studied in universities and is quite complicated in itself. However, there is nothing wrong with this: the Gaussian method is just an algorithm that is enough to remember, so that later it can be applied practically without changes in any similar problems. This article will provide the basic and necessary concepts, as well as a detailed explanation on a specific example. Last modified: 2025-01-23 12:01
This is the name of a special type of cells with a rather dense shell. What are disputes? They can be present in several categories of organisms: bacteria, fungi, plants. Their functions are different. Last modified: 2025-01-23 12:01
From time immemorial, people have watched the night sky and noticed that in addition to stationary objects, there are those that change their position relative to the rest. Usually we say that these are stars, but is it really? What celestial bodies are called planets and what criteria must an object have in order for it to be called a planet? Which of them are part of the solar system?. Last modified: 2025-01-23 12:01
In our galaxy, and indeed in the entire universe, there is a great variety of different celestial objects. In the night sky, we can observe them in the form of a huge number of twinkling dots and specks surrounding us from all sides. But what celestial bodies are called stars and why do we see their glow?. Last modified: 2025-01-23 12:01
A statistical model is a mathematical model that embodies a set of statistical assumptions about generating some sample data and similar data from a larger population. A statistical model represents, often in a greatly idealized form, the process of generating data. Last modified: 2025-01-23 12:01
Where is the Bellingshausen polar station? Is it possible to visit it? What features does the station have and when was it built?. Last modified: 2025-01-23 12:01
Each company that manufactures products or provides services regularly calculates the cost of manufactured products and the cost of services. This indicator makes it clear how efficient and economical the company's production is. In addition, the cost directly affects the price level of the company. Now we will talk in detail about this company performance indicator. Last modified: 2025-06-01 07:06
Linguistics is the science of language, studying it both in its entirety (as a system), and its individual properties and characteristics: origin and historical past, qualities and functional features, as well as the general laws of construction and dynamic development of all languages in Earth. Last modified: 2025-01-23 12:01
The typology of society in sociology is one of the most important problems not only in this science, but also in many other branches. This article will consecrate this issue, present a brief history of its study, starting with the works of Karl Marx and ending with the latest scientific research in this area. Last modified: 2025-01-23 12:01
Currently there are many specialists who have devoted themselves to the physical or chemical sciences, and sometimes both. Indeed, most phenomena can be logically explained precisely through such experiments. We will consider physical methods of research in more detail. Last modified: 2025-01-23 12:01
Movement is one of the main features of the world we live in. It is known from physics that all bodies and the particles of which they are composed are constantly moving in space even at absolute zero temperatures. In this article, we consider the definition of acceleration as an important kinematic characteristic of mechanical motion in physics. Last modified: 2025-01-23 12:01
Questions of dependence (or independence) of some quantities from others can confuse the idea of physical processes to the point of complete misunderstanding. It is clear that if you heat the thermometer, then it will not get warmer outside. And what about electricity? It's not all that clear. Last modified: 2025-01-23 12:01
Acceleration and speed are two important kinematic characteristics of any type of movement. Knowing the dependence of these quantities on time allows you to calculate the path traveled by the body. This article contains the answer to the question of how to find the acceleration, knowing the speed and time. Last modified: 2025-01-23 12:01
At present, astronomy has adopted the division of the entire celestial sphere into 88 sections - constellations - with officially fixed boundaries. However, in the past, constellations were interpreted as sets of stars that stand out in the sky. At different times, they were given names associated with important concepts for people. The small southern constellation Compass is one of these kind of "monuments of the era". Last modified: 2025-01-23 12:01
Atomic emission spectroscopy (spectrometry) - AES or atomic emission spectral analysis - a set of elemental analysis methods based on the study of the emission spectra of free atoms and ions in the gas phase (see the group of methods of optical spectroscopy). Usually, emission spectra are recorded in the most convenient optical wavelength range from ~200 to ~1000 nm. Last modified: 2025-01-23 12:01
The shape of a human face and its features can tell a lot about the personality of its owner. Indeed, lines or wrinkles that form over time as a result of certain repetitive facial expressions say a lot about character. This article will provide information about the shape of the eyebrows in physiognomy. And also it will be possible to learn how to recognize in people benevolence, anger, reliability and other character traits. Last modified: 2025-01-23 12:01
In Latin, the word "impulse" means a blow, a push. Man has always been surprised by the effect produced by a blow. Let's try to analyze from the standpoint of physics such concepts as impact force, momentum of force and the formula for its calculation. Last modified: 2025-06-01 07:06
Supramolecular chemistry is a field of science that goes beyond particles that focuses on scientific systems made up of a discrete number of assembled subunits or components. The forces responsible for spatial organization can range from weak (electrostatic or hydrogen bonds) to strong (covalent tangencies). Last modified: 2025-06-01 07:06
The blue whale, the largest living animal, makes a sound that is much louder than the noise of a launching rocket. Such a loudness a person cannot bear. There is even a noise weapon, its volume is only a little more than the voice of a whale. What determines the sound volume? Why can intense, low sounds hurt and even be deadly, while high ones can't? Why are low sounds heard at a greater distance than high ones? The article will answer these questions. Last modified: 2025-01-23 12:01
The relational data model is a unique approach to managing parameters using structure and language according to single-order predicate logic. It was first described in 1969 by the English scientist Codd. In this project, all parameters are presented as tuples grouped into certain relationships. Last modified: 2025-01-23 12:01
Pseudo-random numbers [pseudo-random numbers], pseudo-random variables - an algorithmically generated sequence of numbers that have the properties of random numbers and are used instead of the latter when solving a number of classes of problems on a computer (for example, the Monte Carlo Method). Last modified: 2025-01-23 12:01
The question of how many dimensions there are in the Universe, as it is known for certain, people asked back in the 17th century. And if, until recently, a person only guessed that other stars have planets, and then discovered this, now it has become clear that there are much more than four dimensions. Last modified: 2025-01-23 12:01
Paul Naim Berg is an American biochemist, professor at Stanford University, an honorary member of the US National Academy of Sciences. He is the recipient of the Nobel Prize for achievements in chemistry. It is known that Paul Berg created the first transgenic organism. The scientist was awarded the National Science Medal for his contribution to the development of science. Last modified: 2025-01-23 12:01
System analysis is a scientific method of cognition, which is a sequence of actions to establish structural relationships between variables or constant elements of the system under study. Relies on a set of general scientific, experimental, natural science, statistical, mathematical methods. Last modified: 2025-01-23 12:01
The problem of soil deflation in Africa, Europe, Asia, America is very relevant. This is one of the key difficulties associated with the ecological state of the soils of our planet. Ecologists and geologists urge to pay special attention to it, arguing that underestimation of this disaster can result in a global crisis. Indeed, deflation is a serious threat to the future of the globe. Last modified: 2025-01-23 12:01
Criminal psychology (eng. Criminal psychology from lat. criminalis - criminal) is a field of legal psychology that studies the psychological mechanisms of offenses and the psychology of offenders, problems of education, the structure of functioning and disintegration of criminal groups. Last modified: 2025-01-23 12:01
Demecology (from other Greek δῆμος - people), population ecology - a section of general ecology, the object of study of which is the change in the number of populations, the relationship of groups within them. Within the framework of deecology, the conditions under which populations are formed are clarified. Demecology describes fluctuations in the number of different species under the influence of environmental factors and establishes their causes. Last modified: 2025-01-23 12:01
Narrative interview is a qualitative method of researching the human personality. It includes some features of the conduct that allow you to analyze at a deep level. Actively used in therapy and research. Last modified: 2025-01-23 12:01
One of the important questions in the study of thermodynamic systems in physics is the question of whether this system can perform some useful work. Closely related to the concept of work is the concept of internal energy. In this article, we will consider what the internal energy of an ideal gas is and give formulas for calculating it. Last modified: 2025-01-23 12:01
Filatov Nil Fedorovich is an outstanding Russian doctor, the founder of clinical pediatrics and a scientific school. During his relatively short life, he cured a lot of children. For services to Russia in Moscow, in the square of the Maiden's Field, a monument was erected to him, on which the lines "To a friend of children" are carved. Last modified: 2025-01-23 12:01
Multidimensional scaling is a method of data analysis and visualization using the location of points corresponding to the studied (scaled) objects in a space of lesser dimension than the feature space of objects. The points are placed so that the pairwise distances between them in the new space differ as little as possible from the empirically measured distances in the feature space of the objects under study. Last modified: 2025-01-23 12:01
The history of sociology has ancient roots. The first system explaining the nature, the world and the place of the people in it was mythology. Sociological research in world science began to play a certain role from the 18th century. It was then that some countries began to conduct regular population censuses. Last modified: 2025-01-23 12:01
When studying the behavior of gases in physics, problems often arise to determine the energy stored in them, which theoretically can be used to perform some useful work. In this article, we consider the question of what formulas can be used to calculate the internal energy of an ideal gas. Last modified: 2025-01-23 12:01
The cosmological model of the universe is a mathematical description that attempts to explain the reasons for its current existence. It also depicts evolution over time. Modern cosmological models of the Universe are based on the general theory of relativity. This is what currently gives the best representation for a large scale explanation. Last modified: 2025-06-01 07:06
Knowledge and skills determine the position of a person in society. The information available to the technical system determines the result of its operation. The functionality of a technical system determines its use. Objective perception of information and objective rules for its application allow a person to make reasonable decisions and technical systems to work properly. Last modified: 2025-01-23 12:01