13. Решение задачки по химии №8

8. Determine the settling velocity of particles with a radius of 1*10-6 m formed after grinding coffee in water (n=1*10-3 N*s/m2) and in air (n=1.85*10-5 N*s/m2). The density of coffee is 1.1*103 kg/m3, the density of water is 1*103 kg/m3, the density of air is 1.025 kg/m3. How many times is the settling velocity of coffee particles in air greater than their settling velocity in water?

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