1 Hepatitis A, B, and C are the most common viral forms of hepatitis and are the primary focus of this report. 2  Hepatitis D and E are less common hepatitis viruses. 3  Hepatitis D is a serious form of hepatitis that can be chronic. 4  It is associated with hepatitis B because the D virus relies on the B virus to replicate.
Hydrology is the study of water. Water is one of our most important natural resources. Without it, there would be no life on earth. The supply of water available for our use is limited by nature. Although there is plenty of water on earth, it is not always in the right place, at the right time and of the right quality.
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. Hydrostatics are categorized as a part of the fluid statics, which is the study of all fluids, incompressible or not, at rest. Hydrostatics is fundamental to hydraulics, the engineering of equipment for storing, transporting and using fluids.