A Crown Prince or Crown Princess is the heir or heiress apparent to the throne in a royal or imperial monarchy. The wife of a crown prince is also titled crown princess. In Europe, lineal succession conventions usually dictate that the eldest child (as in Sweden, Belgium, Norway and the Netherlands) or the eldest son of the current monarch (Spain, United Kingdom, Denmark) fills this role as Crown Prince or Crown Princess..
Hydrostatics is the branch of fluid mechanics that studies incompressible fluids at rest. It encompasses the study of the conditions under which fluids are at rest in stable equilibrium as opposed to fluid dynamics, the study of fluids in motion.
Hydrogel (also called Aquagel) is a network of polymer chains that are water-insoluble, sometimes found as a colloidal gel. in which water is the dispersion medium. Hydrogels are superabsorbent (they can contain over 99% water) natural or. synthetic polymers. Hydrogels also possess a degree of flexibility very similar to natural tissue, due to their significant water. content. Common uses for hydrogels include. currently used as scaffolds in tissue engineering.