Does air have weight? Detailed answer

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Does air have weight? Detailed answer

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Is there any weight near the air?

Most of us think that air is "nothing", but air is clearly "something" if it is made up of certain gases. Gas does not have a definite size or shape, but it occupies space. The vast ocean of air that surrounds the earth and stretches upward for miles is pulled and held together by the earth's gravity. Therefore, air has weight. And since air is all around us, it adds weight to any object it fills.

For example, a volleyball contains a small amount of air. If you weigh two of these balls, one inflated and one deflated, you will find that the deflated ball is lighter. The weight of the air creates pressure. Air presses on your whole body from all sides, like water if you are at the bottom of the sea. A huge mass of air presses very hard on the Earth, and the pressure at the same time is about one kilogram per square centimeter.

A kilogram is the weight of a column of air with a base area of 1 square centimeter and a height equal to that of the atmosphere. The area of your palm is approximately 77 square centimeters. Imagine that a weight of 77 kilograms is placed on your palm! The reason you don't notice this is because the air under your hand pushes with the same force as it does from above. And the air presses on your head with a force of 270 kilograms, but it does not flatten you, because there is air inside your body that balances the pressure of the outside air.

The higher you climb (for example, to the top of a mountain), the less air above you, the less pressure. At an altitude of 6000 meters, the pressure is approximately 0,4 kilograms per square centimeter. At an altitude of 3000 meters - 0,7 kilograms per square centimeter. If you could go up to a height of 100 kilometers, you would find that there is almost no pressure.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What positive role did alchemy play?

Alchemy is a pre-scientific direction in the development of chemistry that arose in the II-IV centuries in Egypt and became especially widespread in Western Europe in the XII-XIV centuries.

The alchemists considered their main task to be the transformation (transmutation) of base metals into noble ones with the help of an imaginary substance - the "philosopher's stone". Among the goals of the alchemists were also obtaining the elixir of longevity, the universal solvent and other substances with miraculous properties.

In the process of searching for these miraculous remedies, alchemists discovered ways to obtain many practically valuable compounds and mixtures (mineral and vegetable paints, glasses, enamels, metal alloys, acids, alkalis, salts, medicines), and also created methods of laboratory work (distillation, sublimation, filtration), invented new laboratory instruments (e.g. long-term heating ovens, stills). Egyptian alchemists discovered, in particular, ammonia.

Alchemy had a significant impact on medieval culture and contributed to the development of modern science.

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