down-hill gradient
121Qanat — A qanat (from ar. قناة) or kareez (from fa. كاريز) is a water management system used to provide a reliable supply of water to human settlements or for irrigation in hot, arid and semi arid climates. The technology is known to have developed in… …
122Particle accelerator — Atom smasher redirects here. For other uses, see Atom smasher (disambiguation). A 1960s single stage 2 MeV linear Van de Graaff accelerator, here opened for maintenance A particle accelerator[1] is a device that uses electromagnetic fields to… …
123Richard Trevithick — Infobox Scientist name = Richard Trevithick box width = image width = 150px caption = Richard Trevithick, by John Linnell (1792 1882) birth date = April 13, 1771 birth place = Cornwall death date = April 22, 1833 (aged 62) death place = Dartford …
124Rod cell — NOTOC Infobox neuron neuron name = Rod cell image neuron = Fig retine.png caption neuron = Cross section of the retina. Rods are visible at far right. location = Retina function = Low light photoreceptor neurotranmitter = Glutamate morphology =… …
125Loop of Henle — Scheme of renal tubule and its vascular supply. (Loop of Henle visible center left.) Latin ansa nephroni Gray s …
126Mount Keira — Wollongong, New South Wales Overlooking Wollongong Harbour and North Wollongong to Mount Keira …
127Continuous distillation — Image 1: Typical industrial distillation towers Image 2: A crude oil vacuum distillation column as used in oil refineries …
128Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
