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

What is the Riddle of the Nile? 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?

What is the Riddle of the Nile?

Perhaps you do not know that the great African river Nile has its own mystery. In any case, one circumstance concerning the great river has puzzled people for thousands of years. Every year, starting in July, the water level in the Nile begins to rise and in October it becomes 7,5 m higher than in May.

During the flood season, the Nile overflows its banks and brings silt to the fields, which is an excellent fertilizer. This phenomenon - such a significant rise in water in the river - is very unusual, because in Egypt it almost does not rain! Therefore, for hundreds of years people have wondered what is the reason for the annual floods of the Nile.

The answer to the "riddle of the Nile" was found only in the XIX century. The Nile is the longest river in the world. Its length from south to north is 6500 km. It flows mainly through the territory of Sudan and Egypt - states located in northwestern Africa. The annual floods of the Nile have created a fertile valley that runs like a narrow ribbon along the river, surrounded by a hot, arid, and barren desert.

The first people settled in this valley many thousands of years ago. The Nile River is fed from two main sources - the White Nile and the Blue Nile. The White Nile flows out of Lake Victoria in Uganda. It has a calm, even flow and does not affect the change in the water level in the Nile. During April and May, when the Nile reaches its lowest point, 85 percent of it comes from the White Nile.

What about the Blue Nile? It originates in the highlands of Ethiopia, where it rains heavily and snow melts in the mountains. When this rainy season comes, the amount of water in the Blue Nile increases dramatically and this causes the Nile to flood. So simply solved the riddle over which people have puzzled for so long.

Author: Likum A.

 Random interesting fact from the Great Encyclopedia:

How did some children's games come about?

Nowadays, hide-and-seek is played for fun. But hide and seek appeared a long time ago, when this game had a completely different meaning for the people who played it. Adults usually played hide-and-seek. In some places in England there was a custom according to which, when spring came, people went out into the woods and fields to find there flowers and birds that appeared with the onset of this season. Then what was found was brought to the village so that everyone could see that spring had really come.

The search for these signs of spring, which were hiding in the forests, was the beginning of the game of hide and seek. And despite the fact that a lot of time has passed since the appearance of the game, in some countries, even in our time, the one who hides sometimes imitates the cry of a bird. It is interesting that almost all children's games did not begin as games, but from some historical event or from a legend that people believed in.

Sometimes some joyful events served as the beginning for them, sometimes sad ones. "London Bridge is falling" is a game that came into being under very serious circumstances. It doesn't even have anything to do with London! It refers to those times when people believed that after death people had to cross some kind of bridge. Some got on the golden bridge to heaven, while others had to go on the old, rickety bridge to meet the devil. This game is played all over the world, each country has its own name!

 Test your knowledge! Did you know...

▪ What is instinct?

▪ Who is the Caesar salad named after?

▪ Which electronics manufacturer is named after a winged horse?

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

Wirepas Pino Automated Wireless Network for IoT 25.10.2014

The Internet of Things market is growing rapidly. The Finnish company Wirepas, in the wake of such trends, has introduced Wirepas Pino, the first fully automatic multi-hop wireless IoT network designed for sensor networks and machine-to-machine communication.

It is reported that the Wirepas Pino stack is designed from scratch and is designed for simplified networking: according to the developers, the network can take on functions that are very difficult to implement with centralized management. Thanks to this, all Pino nodes have the opportunity to act independently and more efficiently.

Pino does not require configuration, making it easier to deploy, grow, and maintain the network. It is only necessary to provide power to the nodes and gateways, after which the network begins to work, while adapting to the emerging changes. Thanks to unlimited scalability, it is possible to create networks with a high density of nodes, covering large areas. All nodes, regardless of their role, incl. routers are capable of running on batteries for years.

Among the advantages of the network, the efficient use of the time and frequency domains, greater reliability and high energy efficiency are mentioned.

The Pino stack is completely independent of the hardware and can be used by a wide range of applications. It makes it possible to use any chipset for the 2,4 GHz bands, as well as less than 1 GHz. This allows you to deploy networks both indoors and across the city.

Other interesting news:

▪ Nerve cells still regenerate

▪ The smartphone will make the car more powerful

▪ Drives Silicon Power Armor A80

▪ Keys in the hole

▪ Smart car video processor GEO GW5

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ site section Chargers, accumulators, batteries. Article selection

▪ article Let them hate - if only they were afraid. Popular expression

▪ article What is the Big Bang and how long did it last? Detailed answer

▪ article Ancient Russian units of measurement. Tourist tips

▪ article How to shorten a dipole. Encyclopedia of radio electronics and electrical engineering

▪ Escalator Adventure article. physical experiment

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