down-hill gradient
81Star — For other uses, see Star (disambiguation) …
82Elan Valley Reservoirs — The Elan Valley Reservoirs are a chain of man made lakes and reservoirs in the Elan Valley in Powys, Mid Wales (also known as the Welsh Lake District ), using the rivers Elan and Claerwen. The reservoirs are Claerwen, Craig Goch, Pen y Garreg,… …
83Dunedin — For other uses, see Dunedin (disambiguation). Dunedin Māori: Ōtepoti   Metropolitan Area   …
84A1 road (London) — UK road routebox road= A1 caption= The current route of the A1 (red) and the historic route of the Great North Road (blue) length mi= length km= direction= North South start= City of London destinations= Holloway end= Bignell s Corner… …
85Confederate Gulch and Diamond City — Confederate Gulch is a steeply incised valley on the west facing slopes of the Big Belt Mountains. Its small stream drains westward into Canyon Ferry Lake, on the upper Missouri River Valley near present day Townsend, Montana. In 1864 Confederate …
86Transformer — This article is about the electrical device. For the toy line franchise, see Transformers. For other uses, see Transformer (disambiguation). Pole mounted distribution transformer with center tapped secondary winding. This type of transformer is… …
87Death Valley National Park — IUCN Category II (National Park) …
88Navier–Stokes equations — Continuum mechanics …
89Lightning — This article is about the atmospheric electrical phenomenon. For other uses, see Lightning (disambiguation). See also: Lightning strike Lightning striking Atlanta, United States Lightning is an atmospheric electrostatic discharge (spar …
90Avalanche — This article refers to the natural event. For other uses, see Avalanche (disambiguation) An avalanche is an abrupt and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are among the biggest dangers in the… …
