Atmospheric air will enter a refrigeration system any time it is opened for service or any time a new system is being assembled. Atmospheric air contains nitrogen, oxygen, and water vapor, all of ...
Pressure is the amount of force applied per unit area. Pressure can be measured by a pressure gauge, but it is important to know the type of pressure the gauge is reading. This article will cover the ...
Cool idea: NIST’s Daniel Barker, Steve Eckel, Jim Fedchak, Julia Scherschligt and colleagues have developed and tested a technique that uses cold atoms to measure ultralow pressures. (Courtesy: NIST) ...
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