A liquid is forced through a small horizontal tube to determine its viscosity. The diameter of the tube is 0.5 mm; the length of the tube is 1.2 m; and when a pressure difference of 0.8 MPa is applied...

A liquid is forced through a small horizontal tube to determine its viscosity. The diameter of the tube is 0.5 mm; the length of the tube is 1.2 m; and when a pressure difference of 0.8 MPa is applied across the tube, the volume flow rate is 800 mm3 /s. Estimate the viscosity of the liquid.