Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Why is one of the Cossacks in the picture of the Cossacks sitting without a shirt? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Comments on the article Comments on the article

Did you know?

Why is one of the Cossacks in the picture of the Cossacks sitting without a shirt?

In Repin's painting "Cossacks" there is only one Cossack at the table, naked above the waist. The fact is that this character is an avid gambler, there is a deck right next to him. When playing for money in the Sich, there was a tradition to take off your shirts so that no one could cheat by hiding cards in their sleeves.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

Why do we need salt?

The human body contains about 47 liters of water. It turns out that many of our organs contain a surprising amount of water. For example, muscles are 75% water, the liver is 70%, the brain is 79% and the kidneys are 83%!

But this body fluid is not pure water. It's actually saline. Why is it so? According to one scientific theory, all animals living on earth, including humans, are the descendants of organisms that appeared and lived in the sea. The body fluid of these creatures was sea water.

By moving to land, they retained sea water as their body fluid. But the earth is not able to provide enough salt in its natural form. Since salt dissolves in water, a significant part of the salt from the soil is washed out with rainwater into rivers, seas and oceans. As a result, plants growing on the ground do not contain enough salt.

This is why plant-eating animals need salt. The body loses a certain amount of fluid containing salt every day, and plant foods do not replenish it. Animals that eat other animals do not need additional salt. They get the salt they need from the body of their victims. This also applies to humans. For example, the Eskimos eat mainly meat, so their need for salt is very small.

People living far from the sea have an increased need for salt. In ancient Mexico, salt was so highly valued that there was even a god of salt. In Europe, in ancient times, people were often paid with salt for the work they did. The English word "salary" (salary) comes from "salt" (salt).

In the human body, salt accumulates mainly on the skin. If a person eats unsalted food, the blood loses its salt in various ways. Therefore, the skin must transfer its stores of salt into the blood in order to keep its concentration in the blood constant. This often has a positive effect on skin diseases. That is why, for some diseases, doctors often prescribe salt-free diets.

Salt is removed from the body mainly by the kidneys. If a person's kidneys are sick, he is prescribed a low-salt diet so as not to overload them.

 Test your knowledge! Did you know...

▪ Who built the first bridge?

▪ What is Atlas holding on his shoulders?

▪ Why did American Jonathan Lee Riches sue the Guinness Book of Records?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Solidification of bulk substances 30.04.2024

There are quite a few mysteries in the world of science, and one of them is the strange behavior of bulk materials. They may behave like a solid but suddenly turn into a flowing liquid. This phenomenon has attracted the attention of many researchers, and we may finally be getting closer to solving this mystery. Imagine sand in an hourglass. It usually flows freely, but in some cases its particles begin to get stuck, turning from a liquid to a solid. This transition has important implications for many areas, from drug production to construction. Researchers from the USA have attempted to describe this phenomenon and come closer to understanding it. In the study, the scientists conducted simulations in the laboratory using data from bags of polystyrene beads. They found that the vibrations within these sets had specific frequencies, meaning that only certain types of vibrations could travel through the material. Received ... >>

Implanted brain stimulator 30.04.2024

In recent years, scientific research in the field of neurotechnology has made enormous progress, opening new horizons for the treatment of various psychiatric and neurological disorders. One of the significant achievements was the creation of the smallest implanted brain stimulator, presented by a laboratory at Rice University. Called Digitally Programmable Over-brain Therapeutic (DOT), this innovative device promises to revolutionize treatments by providing more autonomy and accessibility to patients. The implant, developed in collaboration with Motif Neurotech and clinicians, introduces an innovative approach to brain stimulation. It is powered through an external transmitter using magnetoelectric power transfer, eliminating the need for wires and large batteries typical of existing technologies. This makes the procedure less invasive and provides more opportunities to improve patients' quality of life. In addition to its use in treatment, resist ... >>

The perception of time depends on what one is looking at 29.04.2024

Research in the field of the psychology of time continues to surprise us with its results. Recent discoveries by scientists from George Mason University (USA) turned out to be quite remarkable: they discovered that what we look at can greatly influence our sense of time. During the experiment, 52 participants took a series of tests, estimating the duration of viewing various images. The results were surprising: the size and detail of the images had a significant impact on the perception of time. Larger, less cluttered scenes created the illusion of time slowing down, while smaller, busier images gave the feeling of time speeding up. Researchers suggest that visual clutter or detail overload can make it difficult to perceive the world around us, which in turn can lead to faster perception of time. Thus, it was shown that our perception of time is closely related to what we look at. Larger and smaller ... >>

Random news from the Archive

CY25200ZZC - programmable clock generator chip 20.03.2004

CYPRESS has launched the CY25200ZZC Programmable Spread Spectrum Clock.

The microcircuit has a variety of program features, multifunctional outputs and control inputs. Significantly reduced electromagnetic radiation. Available in TSSOP-16 package.

Other interesting news:

▪ Hisense 90L90H 5K 4" Laser TV

▪ Tesla electric car battery quick change

▪ Breakthrough in cryomicroscopy

▪ Phone for Chinese

▪ Motherboard ASRock Fatal1ty B85 Killer

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the Electrician website. PTE. Article selection

▪ article Woe onion. Popular expression

▪ article When did humans start eating eggs? Detailed answer

▪ article Deputy director for administrative and economic work. Job description

▪ article Imitation pearls. Simple recipes and tips

▪ article Electric machine rooms. Lubrication of bearings of electrical machines. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024