A device for chemical analysis of small amount of aqueous solution (a lab on a chip) has channels 100 m wide and 10 m deep.

A device for chemical analysis of small amount of aqueous solution (a “lab on a chip”) has channels 100 μm wide and 10 μm deep. With a solution viscosity of 1.3 cP and a density of 1,050 kg/m³, what are the Reynolds number and pressure drop per unit length if the average velocity is 0.1 m/s? Express the pressure drop in Pa/m and in bar/cm.