(of a hollow container) partly exhausted of gas or air. has a pressure (there is usually little reason to care about it though). Wiki User. The evolution of vacuum science which started in the 17 th Century, has mirrored many other scientific achievements, including the the development of the Gas Laws and the discovery of the electron. As a practical matter though, it's really a space with very little matter in it. It depends on the filed of science the term is applied to. Top Answer. s 2), or pounds per square inch.Other units include the atmosphere (atm), torr, bar, and meters sea water (msw). 178. ), is symbolized by the Greek letter kappa, κ. The objective of this study was to investigate the influence of wood dyeing parameters such as vacuum pressure, vacuum … "To come up with anything that can lead to a viable … A vacuum is a volume that encloses little or no matter. The Latin in vacuo is sometimes used instead of in a vacuum (in free space). It may help to consider pressure of a gas in a balloon. Search the Dictionary for More Terms. There is no such thing really as a vacuum, any more than there are atoms or ultimate indivisible particles. In quantum physics, a quantum fluctuation (or vacuum state fluctuation or vacuum fluctuation) is the temporary change in the amount of energy in a point in space, as explained in Werner Heisenberg's uncertainty principle.. A partial vacuum is a vacuum with low amounts of matter enclosed. A total, perfect, or absolute vacuum has no matter enclosed. Definition of in a vacuum in the Idioms Dictionary. 39. The permittivity of an insulating, or dielectric, material is commonly symbolized by the Greek letter epsilon, ε; the permittivity of a vacuum, or free space, is symbolized ε 0; and their ratio ε/ε 0, called the dielectric constant (q.v.
It is a condition well below normal atmospheric pressure and is measured in units of pressure (the pascal). meaning it has a magnitude, but not a direction. Figure 2: Vacuum pressure is measured relative to ambient atmospheric pressure. Vacuum definition is - emptiness of space. What does in a vacuum expression mean? You might already know that it's REALLY hard to get all the matter out of any space.
Also note that, technically, a gas of planets and comets etc. Pressure is a scalar quantity. A vacuum, to us, is a space with no matter in it. Different applications of vacuum in industry and science tend to use a favorite vacuum measuring unit, but from this discussion we can see the relationship between them. of, pertaining to, employing, or producing a vacuum. Definitions by the largest Idiom Dictionary. Synonyms for vacuum at Thesaurus.com with free online thesaurus, antonyms, and definitions. In the sense of a "vacuum cleaner" vacuums is the only plural. For applications concerned with measuring vacuum pressures over this full range, two different approaches are often taken.

Her English vocabulary was growing a word at a time—mostly terms like dust, vacuum, linens, dishes and other domestic terminologies.

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