(a) Calculate the critical velocity above which particles will remain suspended during the\ suspension flow in the pipe. Consider the suspension is flowing under Stokes flow regime.\ (b) How does the critical velocity of the suspension travelling in the pipe change if the solvent\ is ethylene glycol rather than ethanol? Ethylene glycol density is 1110 kg/m3 and dynamic\ viscosity is 0.0162 Pa.s.\ (c) How does the critical velocity of the suspension travelling in the pipe change if the mean\ diameter of the suspended particles is 300 m?\ (d) How does the critical velocity of the suspension travelling in the pipe change if the\ diameter of the pipe is 10 cm?