In computer science, we can use the heat of a gas (or radiation, for example) to generate random noise. From them we can get a lot of random information. However, the question arises, where does this information come from in this gas? We believe that the source of this information in the gas is entropy and in a closed system it should not decrease with time. Suppose we have a box in which there is a set of orderly moving gas molecules (suppose they move like athletes in synchronized swimming, their speeds are the same and coordinates are tied to each other). Obviously such a system can be described using much less information than if it were a random gas. What prevents these molecules from elastically repelling each other and remaining the same ordered set for a long time?
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