mercury-arc tube
61Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… …
62ignitron — /ig nuy tron, ig ni tron/, n. Electronics. a cathode arc vacuum tube with an auxiliary electrode projecting into a pool of mercury: it conducts current when the anode is positive. [1930 35; IGNI(TER) + TRON] * * * ▪ electronics electron… …
63Neon lamp — See also: Neon lighting A General electric NE 34 glow lamp, manufactured circa 1930. A neon lamp (also neon glow lamp) is a miniature gas discharge lamp that typically contains neon gas at a low pressure in a glass capsule. Only a thin region… …
64Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …
65steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
66Ceramic discharge metal-halide lamp — The ceramic discharge metal halide (CDM) lamp, mostly referred to as Ceramic Metal Halide lamp (CMH), is a relatively new source of light that is a variation of the old (high pressure) mercury vapour lamp. The discharge is contained in a ceramic… …
67Relay — This article is about the electrical component. For other uses, see Relay (disambiguation). Automotive style miniature relay, dust cover is taken off A relay is an electrically operated switch. Many relays use an electromagnet to operate a… …
68List of problems solved by MacGyver — This is a list of problems that have been solved by the fictional character MacGyver from the television series of the same name. (This list is not yet comprehensive.) MacGyver employs his resourcefulness and his knowledge of chemistry,… …
69analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… …
70Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …
