Round 3: Tossup 9

An “apparent” form of this quantity equals the velocity gradient to the power of the behavior index minus one in the Ostwald-de Waele power law. (15[1])One form (15[1])of this quantity is divided by another to calculate Trouton’s ratio. (-5[2])Forces named for this quantity (-5[1])dominate in the boundary layer. When this quantity is zero, the Navier-Stokes equations simplify to the Euler equations. In (*) thixotropic (10[1])materials, this quantity decreases when a stress is applied. This quantity does not change under shear (10[1])stress (10[1])for a Newtonian fluid. This quantity comes in “dynamic” and “kinematic” forms and is zero for superfluids. For 10 points, name this measure of a fluid’s resistance to flow. (10[1])■END■

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