8. Determine the settling velocity of particles with a radius of 10 μm, formed after grinding coffee beans, in water (n=1*10-3 Pa*s) and in air (n=1.81*10-7 Pa*s). The density of coffee is 1.1*103 kg/m3, the density of water and air at 293 K is 1*103 kg/m3 and 1.205 kg/m3, respectively.

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