Description of the characteristics and operation of radio waves. In what areas are they used and what types exist
Science 2024, November
Structure, functions, concept and other key features of the mechanism of the state on the example of the Russian Federation
The opaque (black) box model is considered the simplest in systemology. Meanwhile, when it is created, various difficulties often arise. They are determined mainly by the variety of possible options for establishing links between the object and the environment in which it is located
Being the main components of the cell nucleus, chromosomes were discovered in the 19th century by several scientists at once. The Russian biologist I. D. Chistyakov studied their process of mitosis (cell division), the German anatomist Waldeyer discovered them during the preparation of histological preparations and called them chromosomes, that is, staining bodies for the rapid reaction of these structures when interacting with the organic dye fuchsin
The article tells about who discovered the phenomenon of radioactivity, when it happened and under what circumstances
The article talks about how astronauts go to the toilet in space and take a shower, and also on what principle the space sewerage and water supply are arranged
The article tells about what etymology is, what this science does and what methods it uses in its work
The article talks about what a solar prominence is, how it can be dangerous for people and how it is classified
The article describes what an electromagnet is, on what principle it is arranged, and in what areas this type of magnet is used
The article talks about what a waterline is, what it is for, and when the law on the mandatory use of one of its varieties was first introduced
The article talks about what vivisection is, when such operations first began to be carried out, and why they are needed
The Russian Federation differs from other countries of the world not only in its vast territory and the number of autonomous republics, but also in the number of ethnic groups of its population
Russian scientific traditions have had a significant impact on the whole world. It is worth knowing the scientists who have made the greatest contribution
Yuri Kondratyuk was a scientist ahead of his time. His theory of interplanetary travel was confirmed twenty years after the death of an outstanding explorer
What is the name of the science that studies tissues, what is its history? What exactly is the object of study and what are tissues and organs? Is histology useful in treating a person?
What are geographic phenomena? What are the geographic phenomena in nature? How often can they be found and what is the reason for their occurrence?
Have you ever wondered how many living organisms there are on the planet?! After all, they all need to inhale oxygen in order to generate energy and exhale carbon dioxide. The savior of all living beings in this situation is photosynthesis
Let's reveal the relationship between applied and fundamental science. Let's determine the value of the theoretical basis for conducting practical research, using them in various areas of human life
For many people it was and remains a mystery why children learn to speak their native language so quickly. Much less effort is required for them to master foreign speech
The first explosive device was tested in the summer of 1945 in America. By today's standards, the bomb had little power, but at that time the resulting effect exceeded all expectations. The force of the explosion and the impact on the surrounding area turned out to be colossal
Stocks of nuclear weapons around the world are amazing. Officially, nine countries have nuclear missiles of varying power and range. Therefore, it will be useful for every person to know about the consequences of a nuclear explosion and the rules of action in them
Heat treatment of steel is the most powerful mechanism for influencing its structure and properties. It is based on modifications of crystal lattices depending on the game of temperatures
A depleted uranium projectile punches a hole in its target on impact, burning up and disintegrating into tiny particles that propagate through the atmosphere. When inhaled or ingested, they enter the human body, causing catastrophic damage due to internal exposure and heavy metal poisoning. Radioactive contamination will last for centuries, turning the local population into hibakusha - victims of a nuclear bombing
The discovery and exploration of Antarctica is one of the greatest events in history. The discovery of the sixth continent and the further study of its features gave mankind a lot of opportunities to expand their knowledge of the world around them. The most large-scale scientific activity was carried out in Antarctica in the middle of the last century, but even today the icy continent is not deprived of attention
Composed of methane, marsh gas is known to be explosive. It is produced as a result of organic reactions under the water column, where silt and other plants decompose
When viewed with the naked eye, the constellation Pump is unlikely to look spectacular to the observer. However, due to the presence of a number of remarkable stars and galaxies in it, astronomy lovers do not ignore this region of the southern sky with a somewhat strange name at first glance
To be able to solve various problems on the movement of bodies in physics, you need to know the definitions of physical quantities, as well as the formulas by which they are related. This article will address the questions of what is tangential velocity, what is full acceleration and what components make it up
The use of simple mechanisms in physics allows you to study various natural processes and laws. One of these mechanisms is the Atwood machine. Let's consider in the article what it is, what it is used for, and what formulas describe the principle of its operation
Scientists have identified several points that will be fatal for humanity in the future. Among them, the problem of the growth of the population of the Earth has become widely known. It is believed that the resources of the planet are not infinite. One day they will end and humanity will be doomed to extinction if a new planet suitable for life is not found
When studying absolutely any spatial figure, it is important to know how to calculate its volume. This article provides a formula for the volume of a regular quadrangular pyramid, and also shows how this formula should be used using the example of solving problems
What does the word "consistency" mean? What is the lexical meaning of this noun? The article provides an interpretation of the word "consistency", its etymology is indicated. Synonyms mentioned. To consolidate the material, examples of sentences are given
Circular motion or rotational movement of solids is one of the important processes that are studied by the branches of physics - dynamics and kinematics. We will devote this article to the consideration of the question of how the angular acceleration is measured, which appears during the rotation of bodies
In the bowels of our planet, various processes are constantly taking place, which are called endogenous. Such processes are caused by the thermal energy of the mantle and the earth's crust. Energy sources are the decay of radioactive elements and the gravitational differentiation of mantle rocks. These processes cause phenomena such as earthquakes, the appearance and development of islands, oceanic depressions and mountain ranges
Nowadays, we cannot imagine life without technology. Indeed, now everyone in the house has electricity, gas, but how often do we think about what kind of brilliant scientists invented all this? Great chemists, mathematicians, physicists, including the inventor of the light bulb Nikola Tesla, gave this world a new image thanks to their discoveries
Mössbauer spectroscopy is a technique based on an effect discovered by Rudolf Ludwig Mössbauer in 1958. The peculiarity is that the method consists in the return of resonant absorption and emission of gamma rays in solids
Warning! This article is informational, popular science and humorous and entertaining! Alas, although it is now possible to create gold from lead, this process is very capacious and leads to insignificant results
What is color temperature? This is the source of light, which is the radiation of an ideal black body. It exudes certain shades, which is comparable to a light source. Color temperature is a characteristic of the visible beam that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, horticulture, and more
The scientific method is a system of categories, values, regulatory principles, justification methods, samples that guide the scientific community in its activities. It includes ways to study phenomena, systematization, correction of new and previously acquired knowledge
When solving statistical problems and testing hypotheses, we usually ask ourselves which method of analyzing statistical data to use. The article describes the Student's t-test, which is used to determine the probable difference, in particular, between two sets of data. We hope that after reading the article you will decide which method is needed to solve your particular problem
The article briefly describes the structure of the atom and the nucleus of elements. Examples are given for determining the number of electrons, protons, neutrons, and the nuclear charge based on the ordinal number of the element. the difference between absolute, relative atomic mass and mass number is indicated. Examples of problems are given in the solution of which the mass number is used