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1.10 Write down the equations governing the velocity and pressure in steady, two-dimensional flow of an inviscid, incompressible fluid, but for which the density is not a constant, in which the effects of gravity may be neglected. If the fluid is stratified, the density p will depend, in general, on both r and y. Show that the transformation P. Po 7* = py in which po is a constant reference density, transforms the govern- ing equations into those of a constant-density fluid whose velocity components are u* and ot