The article is devoted to radioactive materials. Also considered are the effects of radiation and exposure to radiation, storage facilities for such materials, etc. Last modified: 2023-12-17 05:12
Science 2024, December
What is meteoric iron? How does it appear on Earth? You will find answers to these and other questions in the article. Meteoritic iron is a metal found in meteors and consisting of several mineral phases: taenite and kamacite. It makes up the majority of metallic meteorites, but is also found in other types. Consider meteoric iron below. Last modified: 2023-12-17 05:12
Two-thirds of our planet is occupied by the World Ocean, which even in the current age of high technology is only a few percent explored. In addition, the underwater environment can be attributed to "hard-to-reach" regions, especially if we talk about great depths. Every year, scientists say that for one solved secret of underwater civilizations, there are several new ones. But can a civilization comparable to ours exist somewhere deep under water?. Last modified: 2023-12-17 05:12
In the modern world, life is impossible without chemical reactions that take place everywhere and are both beneficial and dangerous. According to the periodic table of chemical elements of D. I. Mendeleev, metals of group 1 of the main subgroup, which include sodium, react violently with water, forming alkalis - chemically active substances. Last modified: 2024-01-02 17:01
Biology is the science of the general properties of all living things. It began its functioning as an independent discipline relatively recently, at the end of the 19th century. Science owes its appearance to the problems that existed between the definition of the concepts of living and inanimate natural bodies. Last modified: 2023-12-17 05:12
In Russian culture, there are many common surnames in the modern world, one of which is Fedorov. The origin and meaning of the surname is directly related to the name Fedor. It was one of the most common in the XVI-XVII centuries. That is why many people subsequently received generic names formed from this name. Last modified: 2023-12-17 05:12
Understanding different types of climate is for everyone who wants to consider himself a true connoisseur of geography. Last modified: 2024-01-18 03:01
The World Meteorological Organization was formed on the basis of the International Meteorological Organization (IMO). Today it is the official voice of the UN in the problems of the Earth's atmospheric phenomena, the relationship of the atmospheric layer with the oceans and the impact on climate change. Last modified: 2023-12-17 05:12
The armillary sphere is a unique device that makes it possible to track the coordinates and movement of celestial bodies. It was created before our era and remained relevant until the 20th century. Last modified: 2023-12-17 05:12
In sociology, a non-continuous study, or a selective method, is most often used. Its results can be extended to a large set of people, which is called the general. Last modified: 2024-01-02 17:01
With any measurements, rounding off the results of calculations, performing rather complex calculations, this or that deviation inevitably arises. To assess such inaccuracy, it is customary to use two indicators - these are absolute and relative errors. Last modified: 2023-12-17 05:12
It is very easy to get confused in the cycle of life events. Children are taught to distribute their time correctly by adults, who often put everything off until later. As a rule, this “later” never comes. Last modified: 2023-12-17 05:12
Here the reader will find information about the structure of the human throat, its constituent elements and functions. In addition to the throat, we will consider what the nasopharynx, oropharynx and larynx are. Let's get acquainted with the features of the anatomical structure of these structures. Last modified: 2023-12-17 05:12
Coming from a simple, working-class family, he became a world-famous physiologist, bringing priority to Soviet science in many branches of neurophysiology, while being periodically harassed for his unwillingness to follow an officially approved, ideologically verified course in science. Last modified: 2023-12-17 05:12
The cell is the elementary unit of living organisms on Earth and has a complex chemical organization of structures called organelles. These include the nucleolus, the structure and functions of which we will study in this article. Last modified: 2023-12-17 05:12
The human brain is made up of white and gray matter. The first is everything that is filled between the gray matter on the cortex and the basal ganglia. On the surface there is a uniform layer of gray matter with nerve cells, the thickness of which is up to four and a half millimeters. Last modified: 2023-12-17 05:12
What is a nerve impulse? How and where does it occur? How does it pass through our body and at what speed does it do it?. Last modified: 2023-12-17 05:12
How does the brain control voluntary and involuntary movement? What are the neurological abnormalities associated with damage to the pyramidal system of the brain? If conduction is disrupted in some part of the nerve circuit, the muscles in some parts of the body will not be able to receive signals. This will cause paralysis. Paralysis is divided into 2 types: central and peripheral. Last modified: 2023-12-17 05:12
Russian Research Center (RNC) "Kurchatov Institute" is a leading domestic research institution in the field of nuclear energy. In the Soviet Union it was known as the Institute of Atomic Energy. Named after nuclear scientist Igor Kurchatov. Last modified: 2023-12-17 05:12
It is difficult to find a person who would not dream of mysterious, mysterious magic. If you are going to not just dream, but partially touch and realize that the world of magic really exists, then this article is dedicated to you. Let's take the first step together into the world of quantum physics - the world of miracles and magic. Last modified: 2023-12-17 05:12
The course of development of civilization is based on a logical understanding of the world around us. An event that occurs, but does not find a clear logical explanation, is called a paradox. This article describes some of the well-known paradoxes faced by modern humanity. Last modified: 2023-12-17 05:12
Today, only a completely ignorant person does not talk about new, powerful quantum computers that threaten all modern methods of data encryption. What is quantum communication, what will the launch of a quantum communication satellite lead to?. Last modified: 2023-12-17 05:12
Space agencies announce the possibility of manned flight to the Moon and Mars in the not too distant future, and the media instill fear in the minds of the townsfolk with articles about cosmic rays, magnetic storms and solar wind. Let's try to understand the concepts of nuclear physics and assess the dangers. Last modified: 2023-12-17 05:12
The article tells about when such a chemical element as uranium was discovered, and in which industries this substance is currently used. Last modified: 2023-12-17 05:12
In the 20th century, G alton's name was mostly associated with eugenics, which is often seen as an expression of class prejudice. However, such a vision of eugenics distorts his thought, since the goal was not to create an aristocratic elite, but a population consisting entirely of the best men and women. Last modified: 2023-12-17 05:12
Ferromagnetic material has special properties and differs significantly from paramagnets and diamagnets. For example, these substances have high magnetic permeability and are capable of amplifying external magnetic fields by several hundred thousand times. Last modified: 2023-12-17 05:12
Saliva is a clear, colorless liquid. This is the secret of the salivary glands, separated into the oral cavity. It provides taste perception, promotes articulation, lubricates chewed food. Last modified: 2023-12-17 05:12
The shoot of plants consists of parts that are functionally interconnected, can be modified depending on environmental conditions and give each plant its own unique look. Last modified: 2023-12-17 05:12
From our article you will learn what chlorophyll is. It is this substance that determines the green color of plants and is a necessary condition for the synthesis of carbohydrates, and therefore their nutrition. Last modified: 2023-12-17 05:12
At first glance, it may seem that in nature, each species lives in isolation. But in fact, this is not at all the case. All living organisms are in close interaction with each other and elements of inanimate nature. Commensalism is one such relationship. We will consider its main characteristics in our article. Last modified: 2023-12-17 05:12
Different countries have adopted different measures of volume and weight, and often they look rather unusual for a Russian person, because we do not encounter them daily. One such unit of weight is the bushel. Where it is used and how much it is - a bushel - in terms of the usual system of measures, you can find out from this article. Last modified: 2023-12-17 05:12
The article briefly discusses thermal conductivity in its simplest terms. Therefore, you should not look here for those who want accurate and complex physical formulas. Instead, the basics of the formation of the above physical parameter for different media will be considered. And, of course, the seeker will be able to draw for himself something new, hitherto unknown. Last modified: 2023-12-17 05:12
The article will tell you about the structure of the eye. How does a person see? How is the eye? What is he ill with? In the material about this complex topic - in simple words. Last modified: 2023-12-17 05:12
The article talks about what humanity as a whole is, what its distinctive features are, and what a possible future awaits us. Last modified: 2023-12-17 05:12
A plane is a geometric object whose properties are used when constructing projections of points and lines, when calculating distances and dihedral angles between elements of three-dimensional figures. Consider in this article, with the help of which equations you can study the location in space of planes. Last modified: 2024-01-02 17:01
Aerodynamics is a field of knowledge that studies the movement of air flows and their effects on solid bodies. It is a subsection of hydro- and gas dynamics. Research in this area dates back to ancient times, to the time of the invention of arrows and planning spears, which made it possible to send a projectile further and more accurately at a target. Last modified: 2023-12-17 05:12
Have you ever wanted to be a pilot? Know that a goal without a plan is just a desire (the words of the great classic Antoine de Saint-Exupery). By the way, he was not only a writer, but also a professional pilot. Absolutely all people connected with the sky take courses in aerodynamics. This is the science of the movement of air (gas), which also studies the effect of this medium on streamlined objects. Last modified: 2023-12-17 05:12
The article talks about limiting environmental factors. Their characteristics are given, as well as the features of the influence of these agents on living organisms are noted. Last modified: 2023-12-17 05:12
Nuclear energy produces electricity and heat energy by converting nuclear energy. Last modified: 2023-12-17 05:12
A chemical element is a collection of a certain kind of atoms with the same nuclear charge and the number of protons, which exhibit characteristic properties. All known elements are ordered in D.I. Mendeleev, but this table is not completely complete. And now they are conducting various scientific experiments, trying to discover new chemical elements. Last modified: 2024-01-02 17:01