15. The electrokinetic potential of an orange juice sol is 50 mV. Determine the electrophoresis rate and electrophoretic mobility of spherical sol particles, if the relative permittivity of the medium ε is 54.8, the external EMF is 120V, the distance between the electrodes is L=40 cm, the viscosity of the medium is η=4.5*10-3 Pa*s.

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