various types of antennas
31Clothes hanger — Wire (top) and wooden (bottom) clothes hangers …
32Earthing system — In sulvent systems, an earthing system defines the electrical potential of the conductors relative to that of the Earth s conductive surface. The choice of earthing system has implications for the safety and electromagnetic compatibility of the… …
33Tether satellite — A tether satellite is a satellite connected to another by a thin cable called a tether. The space tether idea had its origin in the late 1800s. The idea became more popular in the 1960s, and subsequently NASA examined the feasibility of the idea… …
34nickel — /nik euhl/, n., v., nickeled, nickeling or (esp. Brit.) nickelled, nickelling, adj. n. 1. Chem. a hard, silvery white, ductile and malleable metallic element, allied to iron and cobalt, not readily oxidized: used chiefly in alloys, in… …
35Wireless — communication is the transfer of information over a distance without the use of electrical conductors or wires . [citeweb|title=Wireless Communication|url=http://www.sintef.no/content/page1 11881.aspx|publisher=sintef.no|accessdate=2008 03 16]… …
36Rosario, Santa Fe — For other uses, see Rosario (disambiguation). Rosario   City of Rosario   Clockwise from top: the National Flag Memorial s tower and pro …
37Coherence (physics) — In physics, coherence is a property of waves that enables stationary (i.e. temporally and spatially constant) interference. More generally, coherence describes all properties of the correlation between physical quantities of a wave. When… …
38Whisker (metallurgy) — Silver whiskers growing out of surface mount resistors Metal whiskering is a crystalline metallurgical phenomenon involving the spontaneous growth of tiny, filiform hairs from a metallic surface. The effect is primarily seen on elemental metals… …
39List of radars — This is a list of radars. A radar is an electronic system used to detect, range (determine the distance of), and map various types of targets. United States Military Naval Early S band RADAR DesignationsMacintyre, Donald, CAPT RN Shipborne Radar… …
40Point source — For other uses, see Point source (disambiguation). A point source is a single identifiable localized source of something. A point source has negligible extent, distinguishing it from other source geometries. Sources are called point sources… …
