A perfect plasma cocktail like a perfect martini of gin or vodka (purified grains spirit) and vermouth (purified fruits spirit) is complete mixing of two or more fluids. Although a high percentage of this mixture is water there must be factors that distinguish one fluid from the other. Perfection arises when these distinctions disappear and when fluids mixed naturally with no extra efforts. The old cliché that the mixing process must be shaken and not stirred carries no weight but futility. For plasma, the two fluids are Fermi liquids and Bose liquids.
Is it possible theoretically to mix two fluids? Practically it is very difficult to mix oil and water without vigorous shaking into a colloidal salad dressing. Even then the suspended fluid particles are easily recognizable. In time, the water settles at the bottom, the oil floats on top. Separability is preserved by differences in densities. The key word is density. It is the difference in density that distinguishes one substance from another regardless of other conditions of temperature and pressure. Isaac Newton was probably the first to define density as the ratio of mass over the occupied volume. Constant density implies that this ratio is also a constant regardless of changes in mass and volume.
However, when pressure is constant and temperature is varying it is possible to alter the density by changes in the volume. Common sense dictates density varies in direction proportion with temperature. One exception to this rule is water, the most precious substance on earth. At low temperature water is less dense than at higher temperature. That is why solid ice floats on liquid water. This asserts that water molecules expand when frozen to the constant worries of water pipes’ layers especially in winter months.


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