down-hill gradient
51United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
52Electron transport chain — The electron transport chain in the mitochondrion is the site of oxidative phosphorylation in eukaryotes. The NADH and succinate generated in the citric acid cycle are oxidized, providing energy to power ATP synthase …
53Darjeeling Himalayan Railway — World Heritage Site Darjeeling Himalayan Railway …
54Scalar potential — A scalar potential is a fundamental concept in vector analysis and physics (the adjective scalar is frequently omitted if there is no danger of confusion with vector potential). Given a vector field F, its scalar potential V is a scalar field… …
55Cromford and High Peak Railway — The Cromford and High Peak Railway (C HPR) in Derbyshire, England, was completed in 1831, to carry minerals and goods between the Cromford Canal wharf at High Peak Junction (53°06′01″N 1°32′01″W / …
56Hundred of Hoo Railway — The Hundred of Hoo Railway is a railway line in Kent, following the North Kent Line from Gravesend before diverging at Hoo Junction near Shorne Marshes and continuing in an easterly direction across the Hoo Peninsula, passing near the villages of …
57Photosynthesis — Composite image showing the global distribution of photosynthesis, including both oceanic phytoplankton and vegetation …
58Scientology — Infobox Organization size = 120px caption = The Scientology Symbol is composed of the letter S that stands for Scientology and the ARC and KRC triangles, two important concepts in Scientology name = Scientology formation = 1953 type = Religious / …
59Chesham branch — The sharply curved embankment into Chesham station and the entrance to the disused second platform Overview …
60Geographic information system — GIS redirects here. For other uses, see GIS (disambiguation). A geographic information system, geographical information science, or geospatial information studies is a system designed to capture, store, manipulate, analyze, manage, and present… …
