perfect vacuum


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perfect vacuum

[′pər·fikt ′vak·yəm]
(physics)
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Only 107 to choose from, with filters, turbo nozzles, root cyclone technology (you tell me!) bags, no bags, faces, names (George or Henry - true.) Everything the perfect vacuum cleaner should have - but not all in the same model.
Best Buy: Dyson, the Perfect Vacuum for Pet Owners, with Animal Turbo Tool and Carpet Care Kit, $499.99
For one thing it depended upon a battery that delivered a sustainable charge of electricity, as well as on a perfect vacuum within the glass bulb.
The material houses 100,000 light detectors, similar to a retina's cone and rod cells; it's painstakingly assembled atom by atom inside a perfect vacuum, a place with zero matter, including basic elements found in air, like oxygen.
at a temperature of 20[degrees]C in a perfect vacuum. [2] There is a certain amount of heat transfer by radiation and/or convection from the environment to the specimen providing the energy to dry the wood.
is a perfect vacuum) on pellets to draw moisture out of them.
Among the leading industries of the Third Wave, he identified not only those we've heard so much about (computers, software, telecommunications, biotech), but some that haven't yet made many headline splashes: oceanics, or mining the oceans for food, minerals, and new forms of energy; and industry in space, capitalizing on the efficiencies derivable from little gravity, extreme temperatures, and a perfect vacuum.
The easiest way of explaining this was to suppose that space, even far from sizable bodies, was not a perfect vacuum. (Indeed, a perfect vacuum does not exist and probably cannot exist in the Universe.) There are thin wisps of gas and dust throughout interstellar space, and over vast distances, there is enough of this--of dust, particularly--to dim and redden light.
"I remember two particular students who asked how temperature could be measured in a perfect vacuum near absolute zero.