In industrial process engineering, mixing is a unit operation that involves manipulation of a heterogeneous physical system with the intent to make it more homogeneous. Familiar examples include pumping of the water in a swimming pool to homogenize the water temperature, and the stirring of pancake batter to eliminate lumps (deagglomeration). Mixing is performed to allow heat and/or mass transfer to occur between one or more streams, components or phases. Modern industrial processing almost always involves some form of mixing. Some classes of chemical reactors are also mixers. With the right equipment, it is possible to mix a solid, liquid or gas into another solid, liquid or gas. A biofuel fermenter may require the mixing of microbes, gases and liquid medium for optimal yield; organic nitration requires concentrated (liquid) nitric and sulfuric acids to be mixed with a hydrophobic organic phase; production of pharmaceutical tablets requires blending of solid powders. The opposite of mixing is segregation. A classical example of segregation is the brazil nut effect.
can a gas mix into a liquid explain?
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Answer: yes

Sound waves are created as the air vibrates in response to a person's speech or other sounds. A second person's ear collects these sound waves and converts them into nerve impulses which their brain interprets as sound. In normal speech these waves travel through the air, but with a tin can telephone the waves are transmitted through an additional medium of cups and string.
does a tin can and string really work?
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Answer: yes

The FDA considers hard, aged cheese, such as parmesan and cheddar, made from raw milk to be generally safe for consumption; soft cheese made from raw milk is considered unsafe. These types of cheese are currently legally sold if aged for 60 days or more. Over this period, the salt and acid characteristics of aging cheese generally eliminate the growth of pathogenic bacteria.
is all cheese in the united states pasteurized?
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Answer:
no