- 産業: Education
- Number of terms: 13055
- Number of blossaries: 0
- Company Profile:
Founded in 1879 and named after Texas' greatest hero General Sam Houston, Sam Houston State University is public shcool within the Texas state university system and located in Huntsville, Texas.
It's a multicultural institution that offers 79 bachelorette degree programs, 54 masters and five ...
The change in direction of light as it passes between two objects of differing densities; the angle of refraction and the angle of incidence are related by Snell's Law: n<sub>1</sub>*sinθ<sub>1</sub> = n<sub>2</sub>*sinθ<sub>2</sub>
Industry:Chemistry; Weather
The chemical compounds that living organisms put into the atmosphere, usually related to respiration or fermentation. Monitoring the biogenic emissions helps determine the source and sink of chemicals as well as atmospheric cycles. Examples of atmospheric components from biogenesis are methane, nitrous oxide, or terpenes.
Industry:Chemistry; Weather
The Clean Air Act passed in 1970 and later in November of 1990 made into law established nationwide levels of acceptable air pollution from automobiles, individuals, and industry. The Environmental Protection Agency is responsible for enforcement of standards and regulations of the Clean Air Act.
Industry:Chemistry; Weather
The combination of a drastic temperature and corresponding pressure drop along with the rotation of the Earth on its axis produces a spinning/rotating volume of air. The rotational speed of the winds commonly reaches as high as 180 mph. The motion of these winds form an impenetrable barrier such that the trapped air inside is unmixed, as it is separated from the air outside, and remains quite cold (temperatures drop below ?80 Celsius) until October. Inside the whirling volume of freezing air, the cold temperatures facilitate the condensation of gases into particles that eventually form polar stratospheric clouds.
Industry:Chemistry; Weather
The complete dry weight of organic material found in the biosphere or less strictly, the matter in the biosphere that is contained in living organisms.
Industry:Chemistry; Weather
The compound methyl tertiary butyl ether (MTBE) was blended in gasoline originally in 1979 to serve as an oxygenate. This would theoretically cause the combustion process in internally combustion engines to be more complete. This effort to improve air quality by producing a fuel that was more readily oxidized and decrease the resulting tropospheric ozone production was somewhat effective. A problem arises, however, in the fact that MTBE moves extremely well in water (it may actually move upstream because of its high affinity for water molecules), causes fish kills due to its toxicity to fish, and even at low concentrations, it can render large surface or groundwater sources to be useless. Its use has since been banned in California.
Industry:Chemistry; Weather
The contamination of the atmosphere by any toxic or radioactive gases and particulate matter as a result of human activity.
Industry:Chemistry; Weather
The conversion of nitrogen organic compounds to inorganic compounds of nitrogen. This conversion is accomplished, in the main, by bacteria.
Industry:Chemistry; Weather
The curve or a path that an object makes while in space. Trajectory is usually a set of points on the path taken.
Industry:Chemistry; Weather
The deposition of dissolved substances such as airborne particles and gaseous molecules by precipitation. Airborne particles/gaseous molecules in the atmosphere are trapped in water droplets due to falling precipitation (i.e. rain and snow). These substances are then dissolve in the water droplets and are deposited on the surface in which the water droplets come into contact with.
Industry:Chemistry; Weather
