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.
The Discoveries of Archimedes. Archimedes of Syracuse (about 287â212 B.C.) was one of history's foremost scientists and inventors. More than a millennium ahead of its time, his work laid the foundation for branches of mathematics, physics, engineering, and even computer science.