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81mathematics — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… …
82Ellipse — Elliptical redirects here. For the exercise machine, see Elliptical trainer. This article is about the geometric figure. For other uses, see Ellipse (disambiguation). Not to be confused with ellipsis. An ellipse obtained as the intersection of a… …
83Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …
84Arecibo Observatory — Arecibo Radio Telescope Organization SRI International, NSF, Cornell University Location …
85Nikkormat — Nikomat Nikomat FT Type 35mm SLR camera Lens mount Nikon F mount Focus manual Exposure Man …
86Virgin Media — Inc. Type Public Traded as NASDAQ: VMED, LSE:  …
87Solar tracker — A solar tracker is a device for orienting a solar photovoltaic panel or concentrating solar reflector or lens toward the sun. The sun s position in the sky varies both with the seasons (elevation) and time of day as the sun moves across the sky.… …
88Reliability of Wikipedia — Vandalism of a Wikipedia article. The section on the left is the normal, undamaged version; and on the right is the edited, damaged version. The reliabili …
89List of The X Factor finalists (UK series 7) — The seventh UK series of The X Factor was broadcast on ITV between 21 August and 12 December 2010. The final 12 were declared on 3 October 2010. Four wildcards were announced on the first live show of the finals on 9 October 2010, bringing the… …
90Transformation (function) — In mathematics, a transformation could be any function mapping a set X on to another set or on to itself. However, often the set X has some additional algebraic or geometric structure and the term transformation refers to a function from X to… …
