4. Find the volumetric rate of electroosmosis if the electrokinetic potential of the corundum membrane surface is 70 mV, the relative permittivity of the medium is 81, the viscosity is 10-3 Pa*C, the current is 260 mA, and the specific conductivity is 110 S/m.
260 mA=0.26 A
70 mV=0.07
110 S/m=110*10-2 Ohm-1*cm-1

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