Also known as: vac., vac..
VAC has various meanings in the Periodical category. Discover the full forms, definitions, and usage contexts of VAC in Periodical.
Pressure less than atmospheric pressure. It is usually expressed in inches of mercury (Hg) as referred to the existing atmospheric pressure. A vacuum is a space that has no pressure and no molecules inside. It is truly and empty space. Although space has a very low pressure (almost a vacuum), there are still particles out there. A volume which contains no matter. A completely empty space. The collapsing can experiment shows the effect of the pressure of gas particles.
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