Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas or atomic gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image.
Read more about Gas.
Some articles on gas:
... is composed of convection cells called granules—cells of gas each approximately 1000 kilometers in diameter with hot rising gas in the center and cooler gas falling in the narrow spaces between them ...
... about the process of how stars and planetary systems are formed from collapsing clouds of gas and dust ... have directly observed protoplanetary disks, brown dwarfs, intense and turbulent motions of the gas, and the photo-ionizing effects of massive nearby stars in the nebula ... There are also supersonic "bullets" of gas piercing the hydrogen clouds of the Orion Nebula ...
... fuels include radioactive isotopes, wood alcohol, grain alcohol, methane, synthetic gas, hydrogen gas (H2), cryogenic gas, and liquefied natural gas (LNG) ...
... The gas van or gas wagon (German Gaswagen Russian душегубка (dushegubka) Serbian душегупка) was an extermination method devised by Nazi Germany to kill victims of the regime ...
... Yamal holds Russia's biggest natural gas reserves ... deposit is planned to be developed by the Russian gas monopolist Gazprom by 2011–2012, the Yamal project, a fact which put the future of nomadic reindeer herding at considerable risk ... An estimate of the gas reserves here is 55 trillion cubic meters (tcm), the world's biggest gas reserves and Russia's largest energy project in history ...
More definitions of "gas":
- (verb): Attack with gas; subject to gas fumes.
Example: "The despot gassed the rebellious tribes"
- (noun): A volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines.
Synonyms: gasoline, gasolene, petrol
- (noun): A fossil fuel in the gaseous state; used for cooking and heating homes.
Synonyms: natural gas
- (noun): The state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container.
Famous quotes containing the word gas:
“Man moves in all modes, by legs of horses, by wings of winds, by steam, by gas of balloon, by electricity, and stands on tiptoe threatening to hunt the eagle in his own element.”
—Ralph Waldo Emerson (18031882)
“one pale woman all alone,
The daylight kissing her wan hair,
Loitered beneath the gas lamps flare,
With lips of flame and heart of stone.”
—Oscar Wilde (18541900)
“A new father quickly learns that his child invariably comes to the bathroom at precisely the times when hes in there, as if he needed company. The only way for this father to be certain of bathroom privacy is to shave at the gas station.”
—Bill Cosby (20th century)