so as water vapor increases, the density of air decreases. Temperature also changes the density of air. As air gets warmer it expands and becomes less dense, causing atmospheric pressure to fall.

From sweltering hot summer days to frigid winter nights, many people can experience exacerbations in respiratory symptoms of ...

Traditionally, car tires have been filled with compressed air. Air is 78 percent nitrogen and just under 21 percent oxygen, ...

Researchers say that as the Earth’s atmosphere heats up, with relative humidity staying mostly the same, a property of the ...

These testers automatically determine the vapor pressure behavior of dead and live crude oil ... and ASTM D6377 (for Crude Oil) eliminates tiresome air saturation and sample chilling. This new ...