core holes

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• Core plug — A core plug that has been corroded from improper engine maintenance. Core plugs, sometimes wrongly called freeze plugs or frost plugs, are plugs that fill the core holes found on water cooled internal combustion engines. The sand casting cores… …   Wikipedia

• Core (manufacturing) — A core is a device used in casting and molding processes to produce internal cavities and reentrant angles. The core is normally a disposable item that is destroyed to get it out of the piece.[1] They are most commonly used in sand casting, but… …   Wikipedia

• Core Research Center — The Core Research Center is a facility run by the United States Geological Survey, located in F bay in building 810 on the Denver Federal Center campus. It is maintained by the USGS to preserve valuable rock cores, well cuttings and various other …   Wikipedia

• Core drill — Truck mounted core drill A core drill is a drill specifically designed to remove a cylinder of material, much like a hole saw. The material left inside the drill bit is referred to as the core. Core drills are used for many applications, either… …   Wikipedia

• core pin —    A chaplet. In lost wax casting, core pins connect the core placed within a wax model to its surrounding mold. Typically many are employed for a work. They vary in size from thin wire to thick bars of metal, depending on the scale of the model …   Glossary of Art Terms

• Magnetic core — A magnetic core is a piece of magnetic material with a high permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, inductors and magnetic …   Wikipedia

• Diamond core drill — bits (sometimes called hole saws) are used to bore holes in brick, concrete, glass, and stone. They are not generally used with softer materials. The bit consists of a metal cylinder, usually relatively soft steel mounted on an arbor. Industrial… …   Wikipedia

• Formation and evolution of black holes — From the exotic nature of black holes, it is natural to question if such bizarre objects could actually exist in nature or that they are merely pathological solutions to Einstein s equations. However in 1970, Hawking and Penrose proved the… …   Wikipedia

• Magnetic core memory — Magnetic core memory, or ferrite core memory, is an early form of random access computer memory. It uses small magnetic ceramic rings, the cores , through which wires are threaded to store information via the polarity of the magnetic field they… …   Wikipedia

• Black holes in fiction — Background science= The concept of a body so massive that even light could not escape goes back to the late 18th century. With the development of General Relativity, it was realized that such bodies would have other odd properties. The idea was… …   Wikipedia

• Magnetic-core memory — A 32 x 32 core memory plane storing 1024 bits of data. Computer memory types Volatile RAM DRAM (e.g., DDR SDRAM) SRA …   Wikipedia