Search results
Results From The WOW.Com Content Network
Lead (/ l ɛ d /) is a chemical element; it has symbol Pb (from Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to ...
A heteronym (also known as a heterophone) is a word that has a different pronunciation and meaning from another word but the same spelling. These are homographs that are not homophones. Thus, lead (/ˈlɛd/ the metal) and lead (/ˈliːd/ a leash) are heteronyms, but mean (/ˈmin/ average) and mean (/ˈmin/ intend) are not, since they are ...
Since the 1970s a new form of lead, restoration lead, was developed based upon medieval lead's metal composition. Restoration lead is stronger than lead came of the prior 100 years or so. [9] Water tightness is achieved by brushing cement under the flanges of the leads to both faces prior to installation or by applying putty afterwards.
Lead (sea ice), a temporary stretch of open water in pack ice; Lead compound, a chemical compound in drug discovery (not necessarily with lead the metal) Pencil lead, the graphite ("lead"), the writing core of a pencil; Sounding lead or sounding line, a line used to measure water depth; Tetraethyllead or lead, a gasoline additive
A lead frame (pronounced / l i d / LEED) is a metal structure inside a chip package that carries signals from the die to the outside, used in DIP, QFP and other packages where connections to the chip are made on its edges. Lead frame for a QFP package, before encapsulation DIP 16 pin Lead frame, after encapsulation and before cutting/separation
A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...
Current flow in one direction emits one color, and current in the opposite direction emits the other color. The other type consists of two dies with separate leads for both dies and another lead for common anode or cathode so that they can be controlled independently. The most common bi-color combination is red/traditional green. Others include ...
A lead paragraph (sometimes shortened to lead; in the United States sometimes spelled lede) is the opening paragraph of an article, book chapter, or other written work that summarizes its main ideas. [1] Styles vary widely among the different types and genres of publications, from journalistic news-style leads to a more encyclopaedic variety.