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 gold considered a precious metal? 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 gold considered a precious metal?

Throughout human history, gold has been considered a precious metal. Perhaps it was the first metal that man met.

One of the reasons why primitive man paid attention to gold could be that gold is found in nature without impurities, that is, it can be found in the form of small nuggets, without the addition of other metals and minerals. Gold has a yellowish tint, so even in ancient times, people sought to get it for making jewelry.

The importance of gold increased when man realized that gold is very easy to work with. It is very easy to turn a gold nugget into a thin plate that can be bent without breaking. That is, already in antiquity, people could give the metal any desired shape. For example, at one time, hoops were made from it, which held the hair. From here went crowns and diadems made of gold.

In the ground, gold reserves are extremely limited. And people who did not have their own gold began to offer their goods in exchange for gold. So gold became a measure of exchange. Other items were short-lived, and gold lasts a very long time. Gold also became a measure of the value of a commodity.

After many hundreds of years, money began to be made from gold, which determined the significance and value of this metal.

Later, bankers began to store gold in safes, and on demand to present the gold, they issued written documents-collateral. Given this practice, governments began to issue currency, or money, which is just a document - an obligation to pay a certain amount of gold on demand. By the way, about half of all the gold mined in the world belongs to the US Department of the Treasury!

Author: Likum A.

 Random interesting fact from the Great Encyclopedia:

Where else is there caffeine besides tea and coffee?

In the leaves of Paraguayan holly, which grows in Central and South America. From them, a drink is brewed, known under the names "Paraguayan tea", "mate" or "tea of ​​the Jesuits". Dried holly leaves contain up to 1,5% caffeine, bitterness and other aromatic substances. Caffeine is also found in kola nuts, cocoa and guarana.

 Test your knowledge! Did you know...

▪ How did stock markets originate?

▪ How did fairs come about?

▪ To whom did 2010 Britons sell their souls in 7?

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:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Glue for the brain 16.04.2021

Brain glue, a reparative hydrogel that mimics the composition and mechanics of the brain, has been developed in the United States. This substance is designed to help people with disabilities after a traumatic brain injury.

The hydrogel was created by the biotechnology company Regenerative Biosciences Center at the University of Georgia (USA). The gel not only protects against the loss of brain tissue after a severe head injury, but also contributes to the functional recovery of the nervous system.

The "glue" mimics the structure and function of the sugar network that supports brain cells, and also contains key structures that bind to basic fibroblast growth factor and brain-derived neurotrophic factor. These are protective protein factors that can increase the survival and recovery of brain cells after severe injury.

According to the US Centers for Disease Control and Prevention, about 5,3 million people in the United States live with a permanent disability associated with a traumatic brain injury. Brain damage following a major TBI usually results in extensive tissue loss and long-term disability.

There are currently no clinical therapies to prevent cognitive impairment or tissue loss.

Other interesting news:

▪ Kevlar for battery

▪ The most advanced space radar LeoLabs

▪ Wearable eyes

▪ The connection between hunger and curiosity

▪ Smart electric scooters Gogoro

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Interesting facts. Selection of articles

▪ This article does not depend on me. Popular expression

▪ article What is Pompeii? Detailed answer

▪ article Cultural peanuts. Legends, cultivation, methods of application

▪ article A simple electronic switch. Encyclopedia of radio electronics and electrical engineering

▪ article Electronic scale for radio receivers. 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