For a centrifuge running at constant speed and temperature, all of the parameters except time are constant during an analysis. The values for these are either well known or can be accurately measured. Within a broad range of analysis conditions, the modified form of Stokes' law
0 5 10 15 20 25 30 35 40 45 50-10-5 0 5 10 Time (ms) Instantaneous Amp. -10-5 0 5 10 Instantaneous Amp. present context, the term amplitude refers to the magnitude of the displacement pattern