A thin layer of blood is examined through a microscope. Estimate how long it will take to notice the Brownian displacement of erythrocytes floating in the blood plasma if the minimum distance that can be recorded is l = 10-6 m. Blood viscosity h = 4.5•10-3 Pa•s, count the erythrocyte a ball of radius r = 3•10-6 m. Temperature t = 27°C.

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