Science

Today we will look at some calcium compounds with hydrogen and carbon - calcium carbonate, hydroxide and calcium bicarbonate. Last modified: 2025-01-23 12:01

The Higgs boson is the most expensive particle of all time. If, for example, a vacuum tube and a couple of brilliant minds were enough to discover the electron, the search for the Higgs boson required the creation of experimental energies that are rarely seen on planet Earth. Last modified: 2025-01-23 12:01

One of the hallmarks of Venus is the special nature of its magnetic field. To the question of whether Venus has a magnetic field, there is the following answer: the planet has practically no own field, but due to the interaction of the solar wind with the atmosphere, an induced field arises. Last modified: 2025-06-01 07:06

Electricity is a stream of particles moving in a certain direction. They have some charge. In another way, electricity is the energy that is obtained during movement, as well as the lighting that appears after receiving energy. The term was introduced by the scientist William Gilbert in 1600. Last modified: 2025-01-23 12:01

Vasily Dokuchaev is a Russian geologist who has reached special heights in soil science. From this article you will get acquainted with the biography of the scientist and his main achievements. Last modified: 2025-01-23 12:01

Aristotle: his main philosophical concepts and contributions to science. What does "Man is a political animal" mean? How to understand this definition in the context of Aristotle's philosophy? Interesting facts from the life of a philosopher. Last modified: 2025-01-23 12:01

What is observation? This is a research method that is used in psychology for an organized and purposeful perception and study of an object. It is used where the intervention of the observer can disrupt the process of interaction of the individual with the environment. This method is especially needed when you need to get a complete picture of what is happening and understand people's behavior. Last modified: 2025-01-23 12:01

What are the characteristics of modern society? The question is not easy, but if we talk about it globally and generally, we get a very solid answer. The modern social system is based on a post-industrial, information and legal society, in which knowledge, technology and science play a fundamental role. A modern person must be cultured and educated both in the humanitarian and in the technical sense. Last modified: 2025-01-23 12:01

Innovation cycles: definition of this concept, enlarged phases, stages and stages. A brief description of the work carried out at various stages. Management of innovation cycles at the state level and within a particular enterprise. Last modified: 2025-01-23 12:01

Forecasting stages: definition, goals and methods of developing a forecast. Models used to describe processes. Brief description of the stages of forecasting: task setting, analysis of conditions, examination and choice of model, verification and implementation. Last modified: 2025-01-23 12:01

The rapid development of petrochemistry began in the 30s. 20th century The dynamics of development can be estimated by the volume of world production (in million tons): 1950 - 3, 1960 - 11, 1970 - 40, 1980 - 100! In the 1990s, petrochemicals accounted for more than half of the world's organic production and more than one third of the entire chemical industry. Last modified: 2025-01-23 12:01

In induction furnaces and devices, heat in a heated device is released by currents arising in an alternating electromagnetic field inside the unit. They are called induction. As a result of their action, the temperature rises. Last modified: 2025-01-23 12:01

When calculating amplifying stages on semiconductor elements, you need to know a lot of theory. But if you want to make the simplest ULF, then it is enough to select transistors for current and gain. This is the main thing, you still need to decide in which mode the amplifier should work - it depends on where you plan to use it. After all, you can amplify not only sound, but also current - an impulse to control any device. Last modified: 2025-01-23 12:01

What are the derivatives of the skin. What is the skin made of. Functions, features and structure of the sebaceous, sweat and mammary glands. How do sweat and mammary glands differ and what do they have in common, how do they develop in men and women. What are human hair and nails made of?. Last modified: 2025-01-23 12:01

Meteorites are characterized by different composition and structure. These features reflect the conditions of their origin and allow scientists to more confidently judge the evolution of the bodies of the solar system. Last modified: 2025-06-01 07:06

White dwarf is a star that is quite common in our space. Scientists call it the result of the evolution of stars, the final stage of development. In total, there are two scenarios for the modification of a stellar body, in one case the final stage is a neutron star, in the other a black hole. Last modified: 2025-06-01 07:06

Breathing is a universal property of all life on Earth. The main property of the respiratory process is the absorption of oxygen, which interacts with organic compounds of living tissues to form water and carbon dioxide. Last modified: 2025-06-01 07:06

Natural polymer: structure, properties, varieties. Classification of polymers, types. Examples and economic importance of some natural macromolecules. Starch, cellulose, amber, silk, wool are natural biopolymers. General characteristics and meaning. Last modified: 2025-01-23 12:01

Poisons and toxic substances are found literally at every step in everyday life. Currently, there are a huge number of various poisons, so there is a need for a detailed and extensive classification of toxic substances according to various characteristics and aspects. Last modified: 2025-01-23 12:01

Many oxides of active metals, such as oxides of potassium, sodium or lithium, can interact with water. In this case, compounds related to hydroxides are found in the reaction products. The properties of these substances, the features of the course of chemical processes in which bases are involved, are due to the presence of a hydroxyl group in their molecules. Last modified: 2025-01-23 12:01

Our spinal cord is the most ancient formation of the nervous system in evolutionary terms. Appearing for the first time in the lancelet, in the process of evolution, the spinal cord with its efferent (motor) and afferent (sensory) neurons improved. But at the same time, it retained its main functions - conductive and regulatory. It is thanks to the sensory neurons of the spinal cord that we withdraw our hand from a hot pot even before the pain appears. Last modified: 2025-01-23 12:01

The local task of pedagogical science at the present stage is to form the content of educational learning areas. Pedagogy allows you to transfer the experience gained by older generations to young people. Last modified: 2025-01-23 12:01

Let's consider the main stages of an experiment conducted within any educational or research organization. There is no specific template or ready-made scheme, according to which any problem is solved. Experimental activity, as well as the features of actions, directly depend on its specificity. Last modified: 2025-01-23 12:01

For the second century in a row, people are trying to study not only the terrestrial diversity of life in all its manifestations, but also to find out if there is life outside the planet, in outer space. These issues are de alt with by a special science - space biology. It will be discussed in our review. Last modified: 2025-01-23 12:01

This man put radiation at the service of mankind, giving a powerful impetus to the development of medicine, although he himself was engaged exclusively in physics. Who was this scientist named Roentgen?. Last modified: 2025-01-23 12:01

In this article, we recall the contribution to the development of geography made by the researchers of Africa. And their discoveries completely changed the idea of the Black Continent. Last modified: 2025-01-23 12:01

As well as the air space, the water space is heterogeneous in its zonal structure. The presence of zones with different physical and chemical characteristics led to the conditional division of the World Ocean into types of water masses depending on the topographic and geographical features of the zone of their formation. About what is called the water mass, we will talk in this article. We will identify their main types, as well as determine the key hydrothermal characteristics of ocean areas. Last modified: 2025-06-01 07:06

Today we will characterize such a group of animals as coelenterates. Representatives, features of the structure, nutrition, reproduction and movement of these animals - you will learn about all this by reading the article. Last modified: 2025-01-23 12:01

The origins of conservatism as a political worldview were laid at the end of the 18th century. This is not surprising if you look at the history of this time in terms of social development. Last modified: 2025-01-23 12:01

Why did scientists decide that the Moon originated from the Earth, due to its collision with a large planet? How did the double planet 2M1207 form? In what year will Apophis approach the Earth and how will this threaten our planet? Is 2017 the last year for our civilization?. Last modified: 2025-01-23 12:01

Deoxyribose is a monosaccharide that plays an important biological role in all living organisms. Physical and chemical properties of deoxyribose. Difference between ribose and deoxyribose. The role of deoxyribose in the formation of the DNA double strand. Last modified: 2025-06-01 07:06

Department Golden algae (you will find a photo, description and description of their individual species in this article) is known, perhaps, only to biologists. Nevertheless, its representatives play a very important role in nature. Golden algae is one of the ancient groups of algae. Last modified: 2025-01-23 12:01

Astronomy is one of the oldest sciences. Since its inception, it has not changed the main method of obtaining information. Astronomical observations have become more detailed and high-tech, but have not changed their essence. Last modified: 2025-01-23 12:01

Such an amazing and familiar square. It is symmetrical about its center and axes drawn along the diagonals and through the centers of the sides. And to look for the area of a square or its volume is not at all difficult. Especially if the length of its side is known. Last modified: 2025-01-23 12:01

We all know very well that electricity is a directed flow of charged particles as a result of an electric field. Any student will tell you this. But the question of what is the direction of the current and where these very particles go can confuse many. Last modified: 2025-01-23 12:01

Since the 1990s, there has been a lot of talk around the world about freon (chlorofluorocarbons or CFCs) and its impact on ozone depletion. There was an opinion of experts that all refrigerants that cause environmental harm would be banned. But is it? Or do we not care? This article discusses the various refrigerants used in air conditioners and refrigerators available on the market and their impact on the environment. Last modified: 2025-06-01 07:06

Types of elephants that exist on Earth. Elephant brain facts. The importance of brain size for animal behavior. Differences in brain size between male and female elephants. The mental abilities of elephants and the development of the brain of animals. Comparison of the structure of the brain of a person and an elephant. Last modified: 2025-01-23 12:01

Even if you believe in one of the theories of the creation of the Earth, namely that it is a "creation of the Lord", it is definitely worth noting that he took good care of the constant change in its appearance. Every day, every minute, our planet is changing under a number of different factors, most of which remain unnoticed by us. However, that doesn't mean they don't exist. Last modified: 2025-01-23 12:01

There is not a single person who would not freeze when looking at the starry sky. However, not everyone knows that the names of stars and constellations are associated with myths and legends. Last modified: 2025-01-23 12:01

Across the world, a large number of people die every year as a result of inhaling toxic gases found in various areas of their activities. These gases are found not only in industrial settings, but also in nature: they are often odorless, colorless and cannot be detected by the human senses. In addition, gases are also used as weapons. Last modified: 2025-01-23 12:01