It is found as the ratio of shear stress to velocity gradient in Newtonian fluids, for which this quantity remains constant.
For an ideal gas, the temperature dependence of this quantity can be calculated with Sutherland's formula, and it usually appears along with the length and a factor of 8 in the denominator of Poiseuille's equation.  Often measured with a Zahn cup, its kinematic form is found by dividing its dynamic form by the density.  It is found as the ratio of shear stress to velocity gradient in Newtonian fluids, for which this quantity remains constant. For 10 points, name this fluid property measured in poise, often defined as the resistance of a material to flow.
For an ideal gas, the temperature dependence of this quantity can be calculated with Sutherland's formula, and it usually appears along with the length and a factor of 8 in the denominator of Poiseuille's equation.  
{viscosity}