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i) Determine the sedimentation coefficient of sphere particles with 0.1 micrometer size and density of 1200 kg/m^3 in tetrahydrofuran (THF) at 25 degrees celcius which density of THF is 889 kg/m^3 and its viscosity is 0.456 mPa.s. ii) Assume the particle size is doubled, determine the sedimentation coefficient.