phase rotation indicator
91Lithium burning — Lithium is generally present in brown dwarfs and not in low mass stars. Stars, which achieve the high temperature (2,500,000 K) necessary for fusing hydrogen, rapidly deplete their lithium. This occurs by a collision of Lithium 7 and a proton… …
92Analyse du cycle de vie — Pour les articles homonymes, voir ACV. L analyse du cycle de vie (ACV) se base sur la notion de développement durable en fournissant un moyen efficace et systématique pour évaluer les impacts environnementaux d un produit, d un service ou d un… …
93Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …
94Pendulum clock — A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. From its invention in 1656 by Christiaan Huygens until the 1930s, the pendulum clock was the world s most accurate timekeeper, accounting for its… …
95Climate change — For current and future climatological effects of human influences, see global warming. For the study of past climate change, see paleoclimatology. For temperatures on the longest time scales, see geologic temperature record …
96Dynamic demand (electric power) — Dynamic Demand is the name of a semi passive technology for adjusting load demands on an electrical power grid. (It is also the name of an independent not for profit organization in the UK supported by a charitable grant from the Esmée Fairbairn… …
97Water — This article is about general aspects of water. For a detailed discussion of its properties, see Properties of water. For other uses, see Water (disambiguation) …
98Mauna Loa — For other uses, see Mauna Loa (disambiguation). Mauna Loa …
99Mercedes-Benz S-Class — Manufacturer Mercedes Benz Production 1954–present Assembly Berlin Frankfurt, Ge …
100Dartmoor tin-mining — The wheelpit at Huntingdon mine The Dartmoor tin mining industry is thought to have originated in pre Roman times,[1] and continued right through to the 20th century. From the 12th century onwards tin mining was regulated by a Stannary Parliament …
