126. Задачка по химии №012 673

301. In whole cow´s milk, the average volume diameter of a drop of fat is from 2.9 to 4.4 microns, depending on individual conditions. Other characteristics are more constant: at 20 °C, the fat density is 0.920 g/cm3, the density of the dispersion medium (skimmed milk) is 1.034 g/cm3, and the viscosity is 1.60 mPa*s.
Let us assume that whole milk with a fat droplet diameter of 4 µm is at 20 °C in a rectangular cardboard "package" 15 cm high. the same diameter? (Note, under these conditions, the ascent time of 50% fat is equal to the time of ascent of one drop from half the height of the package)

304. In homogenized milk, the diameter of fat droplets is from 0.3 to 0.8 microns, depending on the homogenization pressure and other conditions. Suppose we are talking about milk with a droplet diameter of 0.6 µm. Solve problem 301 for this diameter, under other conditions the same as in 301.

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