Where can you see a fire that has not been extinguished since 1962? Detailed answer

Free technical library

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

Where can you see a fire that has not been extinguished since 1962? Detailed answer

Big encyclopedia for children and adults

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

Comments on the article

Did you know?

Where can you see a fire that has not been extinguished since 1962?

In the American city of Centralia, the underground part has been continuously burning since 1962.

The fire began when firefighters set fire to rubbish heaps located in an abandoned pit of an open mine, then extinguishing them. However, they did it badly, and through the smoldering lower layers of debris, the fire spread to other abandoned mines.

They tried to put out the fire, but again unsuccessfully, and due to the increasing concentration of carbon monoxide and the danger to the life of the townspeople, since 1984 they began to be relocated. Now in Centralia, out of 1000 people of the former population, only 9 remain.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How do we distinguish colors?

Taking color photographs is a physical process. But the perception of color by a person is connected with his psyche.

The eyes receive some visual information (but do not "see" in the literal sense of the word), it is transmitted to the brain, which processes it, and only after that we are able to distinguish objects.

Although we "see" with our brain and distinguish colors with it, the eyes perform a very important and irreplaceable function. They perceive seven colors: red, orange, yellow, green, blue, indigo and violet. Some retinal receptors are irritated by twilight light, others are only irritated by bright light, and color vision is associated with them.

How does the eye distinguish colors? This is how the Yang-Helmholtz theory of color vision explains it. The eye contains three types of nerve cells that react respectively to red, green, blue-violet color.

Thus, if all three types of nerve cells receive the same stimulation, we see white. If the eye receives mainly green light, the cells responsible for the green part of the spectrum are excited more than others, and we see green. When the object is yellow, "green" and "red" cells are stimulated.

Test your knowledge! Did you know...

▪ Who is the author of the microscope?

▪ Are the further adventures of Robinson Crusoe described?

▪ Why are there so many rounded letters in the Burmese script?

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

Samsung Galaxy Core II, Galaxy Young 2 and Galaxy Star 2 smartphones 01.07.2014

Samsung has announced several new smartphones of completely different lines. The range of the manufacturer was replenished with models Galaxy Core II, Galaxy Young 2 and Galaxy Star 2.

All devices belong to the budget segment, but represent its different levels. So, Galaxy Core II has the largest display with a diagonal of 4,5 inches with a resolution of 800 x 480 pixels and the most productive quad-core platform with a frequency of 1,2 GHz.

It has 768 MB of RAM and 4 GB of flash memory, of course, expandable via microSD cards. The device is equipped with a 5-megapixel camera, Wi-Fi b / g / n and Bluetooth 4.0 adapters, a 2000 mAh battery and runs on Android 4.4. Its dimensions are 130,3 x 68 x 9,8 mm with a weight of 138 g.

Galaxy Young 2 received a 3,5-inch screen with a resolution of 480 x 320 pixels, a single-core platform with a frequency of 1 GHz and 512 MB of RAM. In addition, the novelty is equipped with a 3-megapixel camera, lacks a front camera and has a 1300 mAh battery. The dimensions of the device are 109,8 x 59,9 x 11,8 mm with a weight of 108 g. Like the previous smartphone, Galaxy Young 2 is running Android 4.4.

The youngest among the presented and concurrently one of the most budgetary Samsung smartphones - Galaxy Star 2, is equipped with the same screen as the previous model. It is based on the Spreadtrum SC6815 platform with a single 7GHz Cortex-A1 processor core. The amount of RAM and flash memory did not decrease - 512 MB and 4 GB, respectively. The kid is also deprived of a front camera, and the rear has a resolution of only 2 megapixels. The battery capacity is 1300 mAh. The dimensions of the smartphone are identical to the Galaxy Young 2. Actually, it is almost impossible to distinguish them from the outside. I am glad that even the most budget smartphone is still running Android 4.4.

All novelties will be available in versions with support for two SIM cards.

Other interesting news:

▪ Star farthest from Earth discovered

▪ seaweed eggs

▪ MRI images become clearer

▪ 1000-core KiloCore processor

▪ Alibaba Tmall Genie Home Assistant

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Audio and video surveillance. Selection of articles

▪ article Nobody wanted to die. Popular expression

▪ article Who published the first newspaper? Detailed answer

▪ article Work in wells, collectors, ventilation chambers. Standard instruction on labor protection

▪ article Thermoregulator on two microcircuits. Encyclopedia of radio electronics and electrical engineering

▪ article Washing in hard and soft water. Chemical experience

Leave your comment on this article:

All languages of this page

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