For a disc-shaped particle of diameter 2.55 mm and length 1 mm, calculate the following diameters: a. the surface-volume diameter (diameter of a sphere having the same external surface to volume ratio as the particle); b. the seive diameter (width of the minimum aperture through which the particle will pass); c. the projected area diameters (diameter of a circle having the same area as the projected area of the particle resting in a stable position).

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