As a follow-up to my column regarding nitrogen use in tires, this from John MacBain, Ph.D: “Nitrogen obeys the same universal gas law as oxygen, hydrogen, and every other gas known to man. Both ...

HVACR is harder if you don’t understand the concepts behind the ideal gas law. First, let’s define some words. Matter – Matter is “stuff,” anything that has weight and takes up space.; Mass – You can ...