A vacuum cleaner (also hoover in colloquial British English British English, or UK English or English English , is the broad term used to distinguish the forms of the English language used in the United Kingdom from forms used elsewhere. There is confusion whether the term refers to English as spoken in the British Isles or to English as spoken in Great Britain, though in the case of Ireland, there are[1]) is a device that uses an air pump A pump is a device used to move fluids, such as gases, liquids or slurries. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure; they only displace fluid, causing a flow. Adding resistance to flow causes pressure. Pumps fall to create a partial vacuum In everyday usage, vacuum is a volume of space that is essentially empty of matter, such that its gaseous pressure is much less than atmospheric pressure. The word comes from the Latin term for "empty," but in reality, no volume of space can ever be perfectly empty. Even putting aside the complexities of the quantum vacuum, the classical to suck Infants, and all baby mammals, are born with a sucking reflex, which they use in nursing liquid foods, such as milk. They do not have to learn this reflex, because it is instinctive. Some adult animals use suction in drinking, as do humans when using drinking straws. In breathing, the diaphragm muscle is used to expand the lungs, allowing air to up dust Dust is a general name for minute solid particles with diameters less than 20 thou . Particles in the atmosphere arise from various sources such as soil dust lifted up by wind, volcanic eruptions, and pollution. Dust in homes, offices, and other human environments consist primarily of human skin cells, but also contain small amounts of plant and dirt, usually from floors. The dirt is collected by either a dustbag or a cyclone for later disposal.
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Ha'aretz
"What we need is a kind of a vacuum cleaner , to suck back all those Israeli brains from foreign universities," Prime ...
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