Definition. Protein in urine â known as proteinuria (pro-tee-NU-ree-uh) â is any excess amount of protein found in a urine sample. Protein is one of the substances identified during urinalysis, a test to analyze the content of your urine. Low levels of protein in urine are normal. Temporarily high levels of protein in urine aren't unusual either, particularly in younger people after exercise or during an illness. If a urinalysis shows you have protein in your urine, you might have a follow-up test that determines how much protein is present and whether it's a cause for concern.
aerodynamics definition. The branch of science devoted to the study of the flow of gases around solid objects. It is especially important in the design of cars and airplanes, which move through the air. Note: A vehicle that has been built to minimize friction with the air is said to be aerodynamically designed.
In aerodynamics, drag refers to forces that oppose the relative motion of an object through the air. Drag always opposes the motion of the object and, in an aircraft, is overcome by thrust. Types of Drag. There are many different types of drag. The most commonly encountered are: Parasitic Drag, composed of Form Drag, which is the result of the aerodynamic resistance to motion due to the shape of the aircraft, Skin Friction Drag, which is due to the smoothness or roughness of the surfaces of the aircraft, and.