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A water supply network or water supply system is a system of engineered hydrologic and hydraulic components that provide water supply.A water supply system typically includes the following: A drainage basin (see water purification – sources of drinking water) A raw water collection point (above or below ground) where the water accumulates, such as a lake, a river, or groundwater from an ...
Polytetrafluoroethylene is a fluorocarbon solid, as it is a high- molecular-weight polymer consisting wholly of carbon and fluorine. PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons exhibit only small London dispersion forces due to the low electric polarizability of fluorine.
the free encyclopedia that anyone can edit. "The Day Before the Revolution" is a science fiction short story by American writer Ursula K. Le Guin (pictured). First published in Galaxy in August 1974, it was republished in Le Guin's The Wind's Twelve Quarters (1975). Set in her fictional Hainish universe, the story has strong connections to her ...
Wikipedia[note 3] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the use of the wiki-based editing system MediaWiki. Wikipedia is the largest and most-read reference work in history.[3][4] It is consistently ranked as one of the ten most popular ...
Top: Lightning and neon lights are commonplace generators of plasma. Bottom left: A plasma globe, illustrating some of the more complex plasma phenomena, including filamentation. Bottom right: A plasma trail from the Space Shuttle Atlantis during re-entry into Earth's atmosphere, as seen from the International Space Station. Plasma (from ...
Typhoid fever, also known simply as typhoid, is a disease caused by Salmonella enterica serotype Typhi bacteria, also called Salmonella typhi.[2][3] Symptoms vary from mild to severe, and usually begin six to 30 days after exposure.[4][5] Often there is a gradual onset of a high fever over several days.[4] This is commonly accompanied by ...
Heat (1995 film) Heat. (1995 film) Heat is a 1995 American crime film [3] written and directed by Michael Mann. It features an ensemble cast led by Al Pacino and Robert De Niro, with Val Kilmer, Tom Sizemore, Diane Venora, Amy Brenneman, Ashley Judd, Wes Studi, Jon Voight, Ted Levine, Dennis Haysbert, and Danny Trejo in supporting roles. [4 ...
