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How many books burned in the Library of Alexandria? Detailed answer

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

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How many books burned in the Library of Alexandria?

Probably from 100 to 700 volumes. It was the only collection of books on Earth that had existed since ancient times.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

In which Asian country is marijuana use legal?

North Korea is the only one in Asia and one of the few countries in the world where the cultivation of hemp and the use of marijuana is legal. However, this does not apply to tourists - the guides assigned to them will not instruct them on a gratuitous basis where they can buy the drug.

 Test your knowledge! Did you know...

▪ What is talc?

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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

Powerful batteries from Solid Power 26.09.2013

Scientists at the University of California, Boulder, have donated next-generation battery technology to a commercial company, Solid Power. The company will commercialize and mass-produce new solid-state batteries that are not only lighter, safer and cheaper than Li-ion, but also have 2-3 times the capacity. Within 18-24 months, comprehensive tests of new batteries will be carried out, after which their mass sale will begin.

Thus, already in 2 years the mass replacement of obsolete, dangerous and expensive lithium-ion batteries may begin on the market. They will be replaced by "dry" solid-state batteries that are not afraid of shock and can store several times more charge.

The new battery does not use an electrolyte, instead the lithium metal anode is separated from the cathode by a ceramic electrolyte. This drastically reduces the weight of the battery, in addition, it becomes much safer and has a large capacity, in particular, it allows at least a 2-fold increase in the range of electric vehicles, bringing it to 300-600 km.

It has been very difficult to create a solid electrolyte that conducts ions as easily as a liquid one. The problem was the low efficiency of such batteries, but scientists managed to solve it. They mixed small particles of cathode material with a solid electrolyte, into which they added a special additive that increases electrical conductivity. This configuration allows ions and electrons to move more easily in the cathode.

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