When this quantity is zero, Burgers’ equation reduces to a quasi-linear hyperbolic differential equation. With pipe length and flow rate, this quantity appears in the numerator of Poiseuille’s (“pwah-ZEY’s”) law for calculating pressure changes. The Navier-Stokes equations reduce to the Euler (“OIL-er”) equations when this quantity (10[1])is zero. Stokes’ law states drag is proportional to radius, velocity, (10[1])and this quantity. The Reynolds number (10[1])is the ratio of inertial forces (10[1])to forces due to this (-5[1])quantity. For a non-Newtonian fluid like cornstarch slurry, this quantity depends on applied stress. This quantity equals zero in superfluids. For 10 points, name this quantity that measures a fluid's resistance (10[1])to flow. ■END■