Wikipedia talk:Reference desk/Archives/April 2005 II

Jet aircraft of the type from which this data was collected typically fly at altitudes greater than 10,000 m; well above the vertical limit of human survivability. Pressure and temperature outside the cabin on this flight are about 26 kPa (one-quarter atmosphere) and -60 °C, respectively. That's low enough that most humans would suffocate in under thirty seconds and freeze solid in a few hours.

Although the environmental conditions outside are harsh, life inside a jet isn't all that bad. While passengers would find it most comfortable if the cabin was kept at one atmosphere there are engineering and economic reasons to maintain the pressure at a lower value. During this flight the cabin pressure was kept at a compromise value of 81 kPa -- much higher than the pressure outside, but still lower than what most people live under. (80 kPa is the average atmospheric pressure at an elevation of 2000 m.) Temperature hardly varied at all, staying nearly constant at 23 °C. (People are far more sensitive to temperature changes than to pressure changes.)

When air is drawn into the cabin from outside, to what temperature does it rise after it has been compressed?

if someone could help me with an answer and explanation for that please.