What is absolute zero temperature? Detailed answer

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What is absolute zero temperature? Detailed answer

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What is absolute zero temperature?

Absolute zero temperature - the beginning of the absolute temperature reading on the thermodynamic temperature scale (Kelvin scale).

Absolute zero is located 273,16 degrees Celsius below the triple point temperature of water, which is assumed to be 0,01 degrees Celsius. As the temperature of the system tends to absolute zero, its entropy, heat capacity, thermal expansion coefficient also tend to zero, and the chaotic motion of the particles that make up the system stops.

The absolute zero of temperature is fundamentally unattainable, and obtaining temperatures approaching it as close as possible is a complex experimental problem, but temperatures have already been obtained that are only millionths of a degree away from absolute zero.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

How many varieties of apples are there in the world?

There are enough different varieties of apples in the world to satisfy any, even the most picky taste. There are more than XNUMX of them in England alone. If you look at the whole world, then there will be several times more of them. It is known that the apple was one of the first fruits that people began to grow themselves.

The homeland of apples, apparently, southeastern Europe and western Asia. In any case, we know that in Europe various varieties of them were grown already two thousand years ago.

The inhabitants of ancient Rome served at least seven varieties of this fruit. Where did such a variety of varieties come from today? At all times, gardeners who grew apple trees in their gardens carried out many experiments with them, trying to get new varieties that were tastier, more prolific, frost-resistant compared to the previous ones.

The most widely used method for obtaining new varieties is as follows. A shoot or bud cut from a tree of one species is planted ("grafted") on a young apple tree of another. In this case, the properties of the resulting plant are a mixture of the advantages and disadvantages of the "parent" varieties. Another method is called "cross-pollination". It lies in the fact that the flowers of apple trees of one variety are pollinated with pollen taken from trees of another.

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Random news from the Archive

Metabolic weight gain switch 04.09.2015

Researchers at MIT and Harvard Medical School have discovered a new way to control human metabolism and tell adipocytes, or fat cells, when to store and when to burn fat.

Scientists have found that it's all about the IRX3 and IRX5 genes, which control the process of thermogenesis, in which fats decompose and heat is produced. Usually, the process of thermogenesis is activated by exercise, diet, or sub-zero temperatures, but in some cases, its activation is very difficult.

Studies show that a single nucleotide genetic difference can lead to obesity or overweight. In individuals at risk, the nucleotide base replaces thymine with cytosine, which triggers the action of IRX3 and IRX5. Those, in turn, turn off the process of thermogenesis, which leads to the accumulation of lipids and, over time, to obesity.

By altering this nucleotide using the CRISPR/Cas9 system, a technology that allows precise changes to the DNA sequence, scientists can replace cytosine with thymine and thus turn off IRX3 and IRX5, restore thermogenesis to a safe level, and reduce lipid accumulation.

Suppressing the actions of the IRX3 gene in mice resulted in significant changes in the body's energy balance, reduction in weight and all major fat stores, and resistance to high-fat diets.

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