A compound-complex sentence combines the compound and the complex sentence. The compound part means that it has two or more complete sentences. The complex part means that it has at least one incomplete sentence.
Archimedes' principle. Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid. Archimedes' principle is a law of physics fundamental to fluid mechanics. It was formulated by Archimedes of Syracuse.
Archimedes' screw predated Archimedes   Archimedes' screw was a tilted cylinder with an interior spiral groove which, when cranked, moved water from a lower eleva â¦ tion to a higher one, since the water was always running downhill within the grooves even as the groves themselves were moving the water higher.