Consider the following equations, and pick which system these correspond most closely (assume partial derivatives): * du/dx + dv/dy = 0 * u>>V g=0 * d/dt=0 * largest gradient du/dy

* dP/dx >>dP/dy * du/dx > 0 A) 2-D problem unlikely because a third dimension is necessary B) horizontal, likely pump driven, viscous flow, changing diameter or slot thickness C) vertical walls with outer wall moving up, steady state D) outside of the boundary layer in turbulent flow where at U(inf) in plug flow E) horizontal plates, parallel, top accelerating from zero to a fast velocity