On+or+in+the+water
51Water (classical element) — Water has been important to all peoples of the earth, and it is rich in spiritual tradition.Greek and Roman tradition Water is one of the four classical elements in ancient Greek philosophy and science. It was commonly associated with the… …
52Water skiing — is a sport where an individual (or more than one individual) is pulled behind a motor boat or a cable ski installation on a body of water wearing one or more skis. The surface area of the ski (or skis) keeps the person skimming on the surface of… …
53Water cure — is a form of water torture in which the victim is forced to drink large quantities of water in a short time, resulting in gastric distension, water intoxication, and possibly death.cite book|title=Oxford English Dictionary|quote=In the… …
54Water hammer — (or, more generally, fluid hammer) is a pressure surge or wave resulting when a fluid in motion is forced to stop or change direction suddenly (Momentum Change). Water hammer commonly occurs when a valve is closed suddenly at an end of a pipeline …
55Water conservation — refers to reducing the use of water.The goals of water conservation efforts include: * Sustainability To ensure availability for future generations, the withdrawal of fresh water from an ecosystem should not exceed its natural replacement rate. * …
56Water activity — or aw is a measurement of the energy status of the water in a system. It is defined as the vapor pressure of water above a sample divided by that of pure water at the same temperature; therefore, pure distilled water has a water activity of… …
57Water potential — is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure, or matrix effects… …
58Water birth — is a method of giving birth, which involves immersion in warm water. Proponents believe this method to be safe and provides many benefits for both mother and infant, including pain relief and a less traumatic birth experience for the baby.… …
59Water organ — The water organ or hydraulic organ (early types are sometimes called hydraulis, hydraulos, hydraulus or hydraula) is a type of automatic pipe organ blown by air, where the power source pushing the air is derived by water from a natural source… …
60Water resources of Singapore — The water resources of Singapore are especially precious given the small amount of land and territory in Singapore s geography while having a large urban population in the city state.Without natural freshwater rivers and lakes, the primary… …
