Tuesday, November 27, 2007

Water

Water (from the Old English word wæter; c.f German "Wasser", Danish "Vand", Russian ???? [voda]) is a tasteless, neutral, and nearly colorless (it has a slight hint of blue) substance in its pure form that is essential to all known forms of life and is known also as the most universal solvent. Water is an plentiful substance on Earth. It exists in many places and forms: mostly in the oceans and glacial ice caps, but also as clouds, rain water, rivers, freshwater aquifers, and sea ice. On the planet, water is endlessly moving through the cycle involving evaporation, precipitation, and runoff to the sea.

Water that humans use is called potable water. This natural resource is becoming more limited in certain places as human population in those places increases, and its availability is a major social and economic concern.

Wednesday, November 21, 2007

Amozon River

The Amazon River (occasionally River Amazon; Spanish: Río Amazonas, Portuguese: Rio Amazonas) of South America is one of the two longest rivers on Earth, the additional being the Nile in Africa. The Amazon has by far the greatest entire flow of any river, carrying more than the Mississippi, Nile, and Yangtze rivers combined. Its drainage area, called the Amazon Basin, is the biggest of any river system. The Amazon could be well thought-out the "strongest" (largest volume of water per second).

The measure of fresh water released to the Atlantic Ocean is enormous: up to 300,000 m³ per second in the rainy season. Indeed, the Amazon is answerable for a fifth of the total volume of fresh water entering the oceans worldwide. It is said that offshore of the mouth of the Amazon filtered water can be drawn from the ocean while still out of sight of the coastline, and the salinity of the ocean is notably lower a hundred miles out to sea.

Tuesday, November 13, 2007

Water Injection

The Water Injection technique used in oil production is where water is injected back into the reservoir generally to increase pressure and thereby stimulate production. Water injection wells are naturally found offshore. This method is used to enlarge oil recovery from an existing reservoir- Water is injected to force unrecovered oil out of tank rock and into nearby oil wells. Usually only 30% of the oil in a reservoir can be extracted. With Water Injection that percentage will be higher and the production rate of a reservoir is secure over a long period of time.

Tuesday, November 6, 2007

Night vision of Infrared

Infrared is used in night vision equipment when there is unsatisfactory visible light to see. Night vision devices control through a process involving the conversion of ambient light photons into electrons which are then improved by a chemical and electrical process and then converted back into visible light.Infrared light sources can be used to augment the available ambient light for conversion by night vision devices, increasing in-the-dark visibility without actually using a visible light source.
The use of infrared light and night vision devices should not be confused with thermal imaging which creates images based on differences in plane temperature by detecting infrared radiation (heat) that emanates from objects and their surrounding environment.