What tributaries of the Don flow side by side and have the same name? Detailed answer

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What tributaries of the Don flow side by side and have the same name? Detailed answer

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What tributaries of the Don flow side by side and have the same name?

In the Voronezh region, two rivers with the name Devitsa flow, and both flow into the Don. The upper Maiden has a tributary called Rossoshka, at the bottom - a tributary of Rossoshka.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How long are the days?

Depends on the circumstances.

A day is a period of time during which the Earth makes one rotation around its axis. And it's never exactly twenty-four hours.

Amazingly, this indicator can fluctuate in one direction or another for as much as fifty seconds! This is because the speed of the Earth's rotation changes all the time - due to friction caused by synoptic situations, tides, and geological events.

On an average year, a day is a fraction of a second shorter than twenty-four hours.

When these discrepancies were revealed with the help of atomic clocks, it was decided to redefine the second as a fixed fraction of a "solar" day, - more precisely, one million six hundred and forty thousandth.

The new second came into use in 1967 and is defined as "a time interval equal to 9 periods of radiation corresponding to the transition between two hyperfine levels of the ground state of the cesium-192 atom in the absence of perturbation by external fields." You can’t say more precisely - it’s just too dreary to pronounce all this at the end of a long day.

The new definition of the second means that the solar day gradually shifts in relation to the atomic. As a result, scientists had to introduce the so-called "leap second" (or "jump second") into the atomic year in order to align the atomic year with the solar year.

The last "leap second" (already the seventh since the establishment of Coordinated Universal Time - UTC in 1972) was added on December 31, 2005 at the direction of the International Service for Estimating the Parameters of the Rotation and Coordinates of the Earth, based at the Paris Observatory.

Good news for astronomers and those of us who love clocks to keep pace with the Earth's movement around the Sun, but a headache for computer programs and all the hardware that runs on space satellites.

The idea of introducing a "leap second" met with a strong rebuff from the International Telecommunication Union, which even made a formal proposal to completely abolish it by December 2007.

Of course, a compromise is possible: wait until the difference between Coordinated Universal Time (UTC) and Greenwich Mean Time (GMT) reaches exactly one hour (somewhere in 400 years) and even then put everything in order. In the meantime, the debate around what counts as "real" time continues.

Test your knowledge! Did you know...

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Among the US population, 100-108 million people are overweight, that is, more than a third of the country's inhabitants are obese. Moreover, a study conducted by sociologists from the University of Chicago found that an emigrant who moved to the United States from a less "well-fed" country has a high chance of getting fat pretty quickly.

A survey of several thousand "fresh" emigrants showed that after a year or several months of living in a new place, obesity was characteristic of only 8 percent of the migrants. But after 10 years of a new life, their share begins to increase and after 15 years already reaches 19 percent. This is true for Europeans, Arabs, Hispanics, Asians, but not for immigrants from Africa.

Meanwhile, environmentalist Paul Higgins of the University of California offers a simple way to lose weight, which at the same time will allow you to reduce oil consumption and fight global warming. The Institute of Medicine of the National Academy of Sciences of the United States recommends walking 5 kilometers a day or cycling 20 kilometers to maintain health and a slim figure. However, more than 60 percent of Americans do not.

Higgins estimates that if all Americans under the age of 60 adopted this lifestyle, not for exercise, but as a replacement for car trips, on average pedestrians would lose 12 kilograms of fat, and cyclists 26 kilograms. And emissions of warming carbon dioxide would be reduced by 11 percent. In addition, it would be possible to save about 117 billion dollars on the treatment of obesity.

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