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				   from the chapter states of matter, what is inversion temp. and reduced temp.


5 years ago

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										inversion in temp:
A temperature inversion is a thin layer of the atmosphere where the decrease in temperature with height is much less than normal (or in extreme cases, the temperature increases with height). An inversion, also called a "stable" air layer, acts like a lid, keeping normal convective overturning of the atmosphere from penetrating through the inversion. This can cause several weather-related effects. One is the trapping of pollutants below the inversion, allowing them to build up. If the sky is very hazy, or is sunsets are very red, there is likely an inversion somewhere in the lower atmosphere. This happens more frequently in high pressure zones, where the gradual sinking of air in the high pressure dome typically causes an inversion to form at the base of a sinking layer of air. Another effect is making clouds spread out and take on a flattened appearance. Still another effect is to prevent thunderstorms from forming. Even in an air mass that is hot and humid in the lowest layers, thunderstorms will be prevented if an inversion is keeping this air from rising. The opposite of a temperature inversion is an unstable air layer.

Reduced temperature
The reduced temperature of a fluid is its actual temperature, divided by its critical temperature:[1]
$T_r = {T \over T_c}$
where the actual temperature and critical temperature are expressed in absolute temperature scales (either Kelvin or Rankine).

5 years ago

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