The sign: Foamy or bubbly urine. What it means: You could have kidney disease. When your kidneyâs filtering units arenât working properly, that can lead to a build-up of protein in your urine. The protein then creates a foamy appearance when it hits the water in the toilet.
This gives us a point in the x1-x2 or phase plane that we can plot. Doing this for many values of t will then give us a sketch of what the solution will be doing in the phase plane. A sketch of a particular solution in the phase plane is called the trajectory of the solution.
Definition of PICTURE PLANE. : the surface of a picture drawn in linear perspective regarded as a transparent plane perpendicular to the lines of sight on which the points of objects in the scene may be considered as projected by straight lines drawn from these points to the eye.ADVERTISEMENT.efinition of PICTURE PLANE. : the surface of a picture drawn in linear perspective regarded as a transparent plane perpendicular to the lines of sight on which the points of objects in the scene may be considered as projected by straight lines drawn from these points to the eye. ADVERTISEMENT.