11. Calculate the value of the flow potential Ε flow, if an aqueous solution of KCl is pushed through the colloid film; conductivity
ω = 1.3 × 10 -2 Ω -1 ⋅ m -1; viscosity of the medium η = 10 -3 Pa · s; ε 0 = 8.85⋅10 -12 F / m; ε = 81; ξ-potential is equal to 6⋅10 -3 V; Ρ = 20⋅10 3 Pa.