Where are the highest and where are the lowest places on the territory of the former USSR? Detailed answer

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Where are the highest and where are the lowest places on the territory of the former USSR? Detailed answer

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Where are the highest and where are the lowest places on the territory of the former USSR?

The highest point in Russia is the Elbrus peak, 5560 meters high, north of the Main Caucasian Range. On the territory of the USSR, the peak of Communism in Tajikistan (7495 meters) rose the highest, and the lowest point was the Karagie depression in Kazakhstan (134 meters below sea level) to the east of the Caspian Sea. The highest point in Ukraine is Mount Hoverla in the Carpathians (2061 meters), the lowest point is the Arabat Spit at sea level. In Russia, the shore of the Caspian Sea is located below all, which is 26 meters below the level of the world ocean.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

How was the hole in the sewing machine needle transferred to a sharp end?

Elias Howe, an American mechanic, developed his first sewing machine in 1844. He was very disturbed by the hole for the thread, located on the blunt end of an ordinary sewing needle. It and the thread trailing behind it did not allow the mechanism to easily pull the needle through the fabric.

The solution was prompted by a nightmare: the mechanic dreamed that he was captured by cannibals, threatening to kill him if he did not immediately create a sewing machine. At the same time, the savages violently shook their spears with holes in the tips! Waking up, Howe sketched a new needle design.

Since then, all sewing machines have used needles with a hole in the sharp end.

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Water is a source of terahertz radiation 25.09.2017

It is known that water intensely absorbs electromagnetic waves in the terahertz range, which is why for a long time it was considered unlikely that liquid water could act as a source of terahertz waves. However, an international team of scientists has demonstrated that a thin layer of water, no more than 200 micrometers thick, irradiated with ultrashort pulses of laser light, is capable of emitting terahertz electromagnetic radiation. And, such a source of terahertz waves can be used in the future in wireless communication technologies, industrial quality control and shooting with high resolution and the ability to penetrate deep into the object being filmed.

In their experiments, the scientists focused the light of a femtosecond laser, a laser whose pulse duration is measured in femtoseconds (10^-12 seconds), on the surface of a thin layer of water. The energy of this pulse leads to the creation of a plasma cloud, consisting of ions and free electrons, at the beam focusing point. Some of the energy of the laser pulse is spent on additional excitation of ions and electrons, which begin to emit waves in the terahertz range.

Further studies have shown that terahertz radiation obtained using water has some features in relation to radiation obtained using other methods. In the case of water, an increase in the duration of the laser pulse leads to an increase in the number and energy of terahertz waves, while other methods require a decrease in the duration and increase in the energy of the pulse to obtain the same effect. Secondly, the energy and amount of terahertz radiation depends on the polarization of the light and the angle of incidence of the laser light beam on the surface of the water film.

The results obtained by scientists cannot yet be explained from the point of view of physical laws and mechanisms known to scientists involved in the processes of formation of terahertz radiation. Therefore, it is still very early to talk about the possibility of any practical application of water as a source of radiation. Scientists hope that further research into the interactions between laser light and water will lead to an understanding of the ongoing processes, on the basis of which it will be possible to develop new terahertz technologies.

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