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Curve C: particle of radius R = 1 μm, density 1.05 g·cm−3, in water at T = 300 K, subject to a constant force F = 2.05 × 10−15 N. Curves A, B, and D–F: R = 1.2 μm, U ∼ Rα, and F ∼ Rβ. A, α = 0, β = 0; B, α = 0, β = 3; D, α = 1, β = 3; E, α = 2, β = 2; F, α = 2, β = 3. Average velocity as a function of τ− for T = 0.46 s.
