Chemistry, Engineering and Materials
In chemistry, engineering, or household usage, a device to separate mixtures. See:
- Filter (aquarium), critical components of both freshwater and marine aquaria
- Filter (chemistry), a device (usually a membrane or layer) that is designed to physically block certain objects or substances while letting others through
- Filter paper, a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solids from liquids or air
- Air filter, a device composed of fibrous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air
- Oil filter, a filter to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil
- Pneumatic filter, a device which removes contaminants from a compressed air stream
- Water filter, removes impurities from water by means of a fine physical barrier, a chemical process or a biological process. Filters cleanse water to various extents for irrigation, drinking water, aquariums, and swimming pools
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Famous quotes containing the words engineering and/or materials:
“Mining today is an affair of mathematics, of finance, of the latest in engineering skill. Cautious men behind polished desks in San Francisco figure out in advance the amount of metal to a cubic yard, the number of yards washed a day, the cost of each operation. They have no need of grubstakes.”
—Merle Colby, U.S. public relief program (1935-1943)
“If our entertainment culture seems debased and unsatisfying, the hope is that our children will create something of greater worth. But it is as if we expect them to create out of nothing, like God, for the encouragement of creativity is in the popular mind, opposed to instruction. There is little sense that creativity must grow out of tradition, even when it is critical of that tradition, and children are scarcely being given the materials on which their creativity could work”
—C. John Sommerville (20th century)