Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at temperatures above 0 °C (273.15 K, 32 °F) at sea level, but it often co-exists on Earth with its solid state, ice, and gaseous state (water vapor or steam). Water also exists in a liquid crystal state near hydrophilic surfaces.
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Some articles on water:
... Subsidence may affect ecosystems, waterways, sewer and water supply systems, foundations, and so on ... oil operators force 1 to 9 million US gallons (34,000 m3) of water mixed with a variety of chemicals through the wellbore casing into the shale ... The high pressure water breaks up or "fracks" the shale, which releases the trapped gas ...
... Water is used in literature as a symbol of purification ... Sherlock Holmes held that "From a drop of water, a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the ...
... hydrogel consisting of fine granular material (such as sand or silt), clay, and water ... When water in the sand cannot escape, it creates liquefied soil that loses strength and cannot support weight ... Quicksand can be formed in standing water or in upwards flowing water (as from an artesian spring) ...
... At the turn of the 20th century, synchronized swimming was known as water ballet ... of London or Glasgow which were equipped with huge on-stage water tanks for the purpose ... After experimenting with various diving actions and stunts in the water, Katherine Curtis started one of the first water ballet clubs at the University of Chicago, where the team began executing strokes, "tri ...
... From 1901 to 1964, the litre was defined as the volume of one kilogram of pure water at 4 °C and 760 millimetres of mercury pressure ... intended to be of the same mass as the 1 litre of water referred to above ... Additionally, the mass-volume relationship of water (as with any fluid) depends on temperature, pressure, purity, and isotopic uniformity ...
More definitions of "water":
- (noun): Once thought to be one of four elements composing the universe (Empedocles).
- (noun): The part of the earth's surface covered with water (such as a river or lake or ocean).
Example: "They were sitting by the water's edge"
Synonyms: body of water
- (verb): Provide with water.
Example: "We watered the buffalo"
- (noun): Binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent.
- (noun): A fluid necessary for the life of most animals and plants.
Example: "He asked for a drink of water"
- (noun): Facility that provides a source of water.
Example: "The town debated the purification of the water supply"; "first you have to cut off the water"
Synonyms: water system, water supply
- (noun): Liquid excretory product.
Example: "The child had to make water"
Synonyms: urine, piss, pee, piddle, weewee
- (verb): Supply with water, as with channels or ditches or streams.
Example: "Water the fields"
- (verb): Secrete or form water, as tears or saliva.
Example: "My mouth watered at the prospect of a good dinner"; "His eyes watered"
Famous quotes containing the word water:
“What a dissimilarity we see in walking, swimming, and flying. And yet it is one and the same motion: it is just that the load- bearing capacity of the earth differs from that of the water, and that that of the water differs from that of the air! Thus we should also learn to fly as thinkersand not imagine that we are thereby becoming idle dreamers!”
—Friedrich Nietzsche (18441900)