The air would be so thin that even the best climber would have no choice but to use supplemental oxygen. Why? Because of the many factors which affect atmospheric pressure. Pioneering scientists ...

PSI stands for pounds per square inch, the unit of measurement for tire pressure. When you hear your mechanic say your right tire's at 30 PSI, it means that's how much air pressure it has.

Vapor pressure, along with dew point and relative humidity, is one of many ways to express the amount of water vapor in the ...

Everyone knows that you need to check your engine oil to make sure your motor won’t blow up, but how many people check their tyre air pressure regularly? Car tyres aren’t just unsafe when they’re old ...