Secondary education and schools

Greek scientist Archimedes and his work "On Floating Bodies". A detailed consideration of the law of Archimedes for an arbitrary liquid and a solid body immersed in it. The nature of the Archimedean buoyant force. Remarks and conclusions that follow from the law of Archimedes. Last modified: 2025-01-23 12:01

Recently, creating a family coat of arms for the school has become a very fashionable and current trend. In fact, there is nothing complicated in creating a coat of arms. It is not necessary to sit on the task in splendid isolation until late at night and draw every stroke. This can be interesting and educational. Last modified: 2025-01-23 12:01

There are times when you need to know how to get ink out of paper. For example, you made a fresh renovation, pasted new wallpaper, and the child decided to leave his autograph on them. What to do?. Last modified: 2025-01-23 12:01

Informatics is a science that studies the ways and methods of transferring, processing and analyzing information, as well as working with computers. In the modern world, when technology is becoming more and more popular and in demand, it is impossible to live without informatics. In turn, this science is divided into sections that allow you to study this discipline in depth. Last modified: 2025-01-23 12:01

For centuries the Russian land has been famous for its cities! The history of the state is truly great. The city of Pskov is one of the pearls of Ancient Russia. It is the birthplace of the first Christian ruler, Princess Olga. Pskov is considered one of the most ancient, its history began long before the baptism of Russia, and to be more precise, from 903. Last modified: 2025-01-23 12:01

The Torres Strait is one of the shallowest, second in the list of its kind. It shares the island of Papua New Guinea and Australia. On two sides (south and north) it connects the largest Pacific Ocean with the Indian. Last modified: 2025-01-23 12:01

Mainland islands (examples will be given below) are part of the land that was previously part of the continent, and later separated from it. This occurs as a result of various hydrological or geological processes. As a rule, the mainland and the island have a fairly similar relief. They are separated by water areas, such as shelf seas and straits. Last modified: 2025-06-01 07:06

Sometimes, looking at a person, people around say: “Yes, he has cockroaches in his head.” What do they mean? This is usually how they characterize people who are distinguished by unusual behavior, extraordinary antics, various eccentricities, in general, not like everyone else. Last modified: 2025-01-23 12:01

In the proposed article, the types of hives are listed, their pros and cons are noted, and the features of their use are indicated. Offered advice on their acquisition. A brief description of the most popular types of hives used in domestic beekeeping is given. Last modified: 2025-01-23 12:01

Glancing around the apartment, people do not even think about how densely aerosols have entered their lives. But some of them are used daily and more than once. So what are aerosols? What are the types of aerosols? In what areas of life are they used?. Last modified: 2025-01-23 12:01

A class teacher is a school teacher who performs the main functions of the organizer of the modern life of schoolchildren, aimed at the diversified development of students. What is the documentation that the class teacher uses in his work?. Last modified: 2025-01-23 12:01

What does free city mean? In German law, this was the name given to cities that were territorially and politically independent. They were not dependent on those states whose territories surrounded them. The said term does not apply to modern city-states. More about what the concept of a free city means will be discussed in the article. Last modified: 2025-01-23 12:01

Mauritius is located in the group of the Mascarene Islands, which lie in the western region of the Indian Ocean, at a distance of about 800 kilometers east of Madagascar. About 91% of the area of the entire state is concentrated on the island of the same name. Last modified: 2025-01-23 12:01

The word " altruism" can be defined as a mental state when a person seeks to achieve the well-being of others. It is genuine if the achievement of the good of outsiders is the main motivation and ultimate goal. Altruism can be a momentary impulse or a permanent trait. Last modified: 2025-01-23 12:01

In dictionaries you can read the following definitions of this concept. Difficulties are circumstances or conditions for the implementation of a process that require some effort to overcome them. And there are also difficulties temporary and permanent, objective and subjective, material and emotional. Let's talk about each type in more detail. Last modified: 2025-01-23 12:01

On the walls in geography classrooms there used to be maps with images of parts of our planet at different scales. Now that's not enough. Maps today need interactive. And not only cards. Last modified: 2025-01-23 12:01

Have you ever thought about why this or that product repels or attracts? This is a very interesting system that designers around the world follow to achieve their goal. They face a lot of problems that are solved with the help of knowledge and experience. Last modified: 2025-01-23 12:01

It will take a lot to make business negotiations, achieve successful results and satisfy both parties. It is necessary to have not only convincing arguments and documents, but it is also necessary to speak reasonably. So what does "reasonably" mean?. Last modified: 2025-01-23 12:01

There are objects that are capable of changing the density of the electromagnetic radiation flux falling on them, that is, either increasing it by collecting it at one point, or decreasing it by scattering it. These objects are called lenses in physics. Let's take a closer look at this question. Last modified: 2025-01-23 12:01

Chinese civilization is very ancient. It is four thousand years old. Since the time of Marco Polo, the Celestial Empire has attracted researchers and travelers. This country has the most inhabitants - it is home to a fifth of all people on the planet. Last modified: 2025-01-23 12:01

The topic "arithmetic progression" is studied in the general course of algebra in schools in the 9th grade. This topic is important for further in-depth study of the mathematics of number series. In this article, we will get acquainted with the arithmetic progression, its difference, as well as with typical tasks that schoolchildren may face. Last modified: 2025-01-23 12:01

Understanding the meaning of words makes it possible to freely communicate in any situation with any worthy contingent of interlocutors. The word "exploit" is often found in the lexicon of modern Russian speakers. But do we all understand what it means to "exploit"?. Last modified: 2025-01-23 12:01

"Cycle" is one of the most commonly used terms. This word can be found in areas such as gynecology, programming, economics, etc. So what are these mysterious cycles? And how do they affect our lives?. Last modified: 2025-01-23 12:01

The article describes the structure of the cell, its main structural components are indicated, organelles and their functions are described. The features of the organization of plant and animal cells are also noted. Last modified: 2025-01-23 12:01

The article describes the process of lymph formation, indicates its main functions and features of movement through the human body. It also talks about lymphostasis and lymph cleansing methods. Last modified: 2025-01-23 12:01

The article describes the causes and essence of population waves, indicates their impact on the number of populations and their genotype. Last modified: 2025-01-23 12:01

The article describes a specific way of getting substances into the internal environment of the cell, indicates the features and significance of pinocytosis. Last modified: 2025-01-23 12:01

Each millimeter of the body's area is permeated with many capillary blood vessels, to which blood is delivered by arterioles and larger main vessels. And although the anatomy of the arteries is not difficult to understand, all the vessels of the body together form an integral branched transport system. Due to it, the tissues of the body are nourished and its vital activity is supported. Last modified: 2025-01-23 12:01

The area of Samara is 541 km². The shape of the city resembles a rectangle, which stretches from north to south for 50 km, and from west to east - for 20 km. The relief of the settlement is a flat area with small hilly areas. Only the northern part is elevated, since the Sokolye Mountains end here (a spur of the Zhiguli Mountains on the left bank of the Volga). Last modified: 2025-01-23 12:01

Everyone is used to thinking that the United Kingdom of Great Britain and Northern Ireland is one country. But this is not a completely correct statement. The kingdom includes four historical and geographical regions. Last modified: 2025-01-23 12:01

One of the most dramatic periods in the history of the American continent is the time of conquest by the representatives of the Old World of territories belonging to the indigenous population. They were very long and violent. Last modified: 2025-06-01 07:06

The Caspian Sea is one of the largest s alt water bodies of the Earth, located at the junction of Europe and Asia. Its total area is about 370 thousand square meters. km. The reservoir receives more than 100 water flows. The largest rivers flowing into the Caspian Sea are the Volga, Ural, Emba, Terek, Sulak, Samur, Kura, Atrek, Sefidrud. Last modified: 2025-01-23 12:01

The machine-building complex is a set of certain industries, the products of which are various machines and mechanisms. Moreover, this formation is characterized by very complex relationships. Last modified: 2025-01-23 12:01

Where does the Volga flow? Perhaps, almost any schoolchildren of a comprehensive school can answer this question. However, this river plays such an important role in the life of a vast country that it is necessary to dwell on its characteristic features in much more detail. Last modified: 2025-01-23 12:01

The Principality of Liechtenstein has been attracting tourists for quite some time. Those who decide to visit the state should study the basic information about it in advance and get acquainted with local traditions. Last modified: 2025-01-23 12:01

The basis of the functioning of our world is largely explained by such a field of science as physics. Although not everyone has made it the main interest of their lives, everyone still needs to know some points. What are the basic physical laws? This will be discussed in this article. Last modified: 2025-01-23 12:01

Only real fashionistas follow the entire gamut of proposed shades described by the Pantone Color Institute. Most consumers are limited to using the options offered by the rainbow. Last modified: 2025-01-23 12:01

The pantheon of Roman pagan gods includes 12 main female and male representatives. In this article, we will find out who the goddess Diana is. And we will get acquainted with goddesses similar to her, found in the mythology of other countries. Last modified: 2025-01-23 12:01

For every aspiring businessman, the biography of Richard Branson can become a real guide in the world of entrepreneurs, because this man really achieved a lot in his life. Persistence, optimism, determination and the ability to dream - that's what led this famous businessman to achievements that many entrepreneurs do not even dare to think about. Last modified: 2025-01-23 12:01

The article tells about the original region of Russia - the North Caucasus. The subject of consideration is both the recent history of the region and the ethnic composition of the population. Last modified: 2025-01-23 12:01