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41Parabolic antenna — A parabolic satellite communications antenna at Erdfunkstelle Raisting, the biggest facility for satellite communication in the world, in Raisting, Bavaria, Germany. It has a Cassegrain type feed. A parabolic antenna is an antenna that uses a… …
42Year — A year (from Old English gēar) is the orbital period of the Earth moving around the Sun. For an observer on Earth, this corresponds to the period it takes the Sun to complete one course throughout the zodiac along the ecliptic. In astronomy, the… …
43Frank Whittle — Infobox Person name = Frank Whittle image size = 300px caption = birth name = birth date = birth date|1907|6|1|df=y birth place = Earlsdon, Coventry, England. death date = death date and age|1996|8|9|1907|6|1|df=y death place = Columbia, Maryland …
44Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …
45Sunset — Sunset, also called sundown in some American English dialects, is the instant when the trailing edge of the sun s disk disappears below the horizon in the west. It should not be confused with dusk, which is the point at which darkness falls, some …
46Fluorescence correlation spectroscopy — (FCS) is a common technique used by physicists, chemists, and biologists to experimentally characterize the dynamics of fluorescent species (e.g. single fluorescent dye molecules in nanostructured materials, autofluorescent proteins in living… …
47SR Leader Class — Infobox Locomotive powertype=Steam name = SR/BR Leader Class Robertson, Kevin: The Leader Project: Fiasco or Triumph? (Oxford: Oxford Publishing Company, 2007) ISBN 0860936066] caption = 36001 at Oxted, taken by British Railways designer = Oliver …
48VALBOND — In molecular mechanics, VALBOND is a method for computing the angle bending energy that is based on valence bond theory. [Root, D. M.; Landis, C. R.; Cleveland, T. Valence Bond Concepts Applied to the Molecular Mechanics Description of Molecular… …
49Oscilloscope — This article is about current oscilloscopes, providing general information. For history of oscilloscopes, see Oscilloscope history. For detailed information about various types of oscilloscopes, see Oscilloscope types. Illustration showing the… …
50neptune — /nep toohn, tyoohn/, n. any whelk of the genus Neptunea, esp. N. decemcostata, common along the eastern coast of North America and having a shell with seven to ten raised reddish brown spiral ridges on a pale beige or yellow background. [ < NL… …
