vacuum is the condition of a completely empty place, without the presence of almost any kind of matter.
Liquids, solids, gases and even air. None of these substances or matters exist in vacuum spaces.
However, the absolute vacuum, which consists of the total absence of materials, exists only in theory. In practice, in our galaxy, vacuum zones are partial, as they still contain some doses of hydrogen or other gases.
But, it is believed that in distant galaxies and in intergalactic space, there may be zones that approach or are in an absolute vacuum state (about 10−10 torr).
No human being could survive in a vacuum. In less than 15 seconds the person would already lose consciousness, due to the absence of oxygen gas to oxygenate the brain.
To create environments that can simulate partial vacuum states, there are vacuum pumps, a technique that was developed by the German physicist Otto Von Guericke (1602 – 1686).
use the vacuum packaging system to protect certain products from contamination by external organisms, because in a vacuum it is not possible for any living being to exist.
Vacuum sealing cannot produce an absolute vacuum, but it can reach a minimum value of 1 atm (atmospheric pressure level) or 760 torr (Torricelli, the unit known when working with a vacuum), which is considered the boundary between a space in vacuum and in non-vacuum.
In the figurative sense of the word, vacuum is often used to refer to any situation or thing that resembles emptiness. For example: "I'm so hungry my belly is a vacuum”.
Another use of this word is seen in the expression “leaving in a vacuum”, which refers to the act of leaving a conversation, leaving the other person talking to themselves (“staying in a vacuum”).
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