2. (5 Pt) A microchannel (height 80 um, width 1 mm, length 10 mm) is perfused with an aqueous solution (density: 10 kg/m, viscosity:10- kg/s m). (1) Estimate the Reynolds number for the flow velocity of 8 mm/s. (2) Is the flow laminar or turbulent? (3) Show schematically the steady state velocity profile inside the channel. (4) The flow downstream is to be split and flow into two channels. Both channels have a height of 80 um. One channel has a width of 60 um and the other 75 um. Which channel will have a higher flow rate? Why? a (5