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sequoia sempervirens / s ɪ ˈ k ɔɪ. ə s ɛ m p ər ˈ v aɪ r ən z / is the sole living species of the genus sequoia in the cypress family cupressaceae formerly treated in taxodiaceae .common names include coast redwood, coastal redwood and california redwood. it is an evergreen, long-lived, monoecious tree living 1,200–1,800 years or more. this species includes the tallest living .
the milky way's spiral structure is uncertain, and there is currently no consensus on the nature of the milky way's spiral arms. perfect logarithmic spiral patterns only crudely describe features near the sun, because galaxies commonly have arms that branch, merge, twist unexpectedly, and feature a degree of irregularity.
october 2010 was the tenth month of that common year. the month, which began on a friday, ended on a sunday after 31 days.. portal:current events. this is an archived version of wikipedia's current events portal from october 2010.
a blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. blast refers to the combustion air being 'forced' or supplied above atmospheric pressure. in a blast furnace, fuel coke , ores, and flux limestone are continuously supplied through .
this is a list of accidents and incidents involving military aircraft which occurred between 1945 and 1949, grouped by the year in which the accident or incident occurred.not all of the aircraft were in operation at the time. for more exhaustive lists, see the aircraft crash record office or the air safety network or the dutch scramble website brush and dustpan database.
steel costs have soared and, as most of my product line consists of heavy steel items, this past year's outrageous fuel costs have added to the problem - shipping product to customers as well as having seven trust materials shipped to me has become unacceptable. as a result, i have given up my manufacturing shop and the overhead that goes along with it .
the sand pulp is first send to the two inlets of the spiral chute.after added water for appropriate pulp density,the pulp swirls down and generates a centrifugal force which separates the ores and sands.the ore concentrate flows into the hopper and is collected through a pipeline.the tailings are discharged by a sand pulp.thus,the whole mineral process is finished.
onyx primarily refers to the parallel banded variety of the silicate mineral chalcedony. agate and onyx are both varieties of layered chalcedony that differ only in the form of the bands: agate has curved bands and onyx has parallel bands. the colors of its bands range from black to almost every color. commonly, specimens of onyx contain bands of black and/or white.
mir russian: мир, ipa: ; lit. peace or world was a space station that operated in low earth orbit from 1986 to 2001, operated by the soviet union and later by russia. mir was the first modular space station and was assembled in orbit from 1986 to 1996. it had a greater mass than any previous spacecraft.at the time it was the largest artificial satellite in orbit, succeeded by the .
agate / ˈ æ ɡ ə t / is a common rock formation, consisting of silica, chalcedony and quartz as its primary components, the formation consists of a wide variety of colours and grain size. agates are primarily formed within volcanic rocks and metamorphic rocks.these stone have been seen to have dated back as far as ancient greece, however with their mediocre durability, their every day uses .
by approaching a planet in a hyberbolic orbit, we don't accelerate from the gravity of the planet, but we acquire the velocity or twice the velocity of the planet's motion. if the planet was stationary, all we would do is change direction. since the planet is moving, we acquire the velocity of the planet while accelerating around it in the .
ocean thermal energy conversion otec uses the ocean thermal gradient between cooler deep and warmer shallow or surface seawaters to run a heat engine and produce useful work, usually in the form of electricity. otec can operate with a very high capacity factor and so can operate in base load mode.
fractional distillation is the most common form of separation technology used in petroleum refineries, petrochemical and chemical plants, natural gas processing and cryogenic air separation plants. in most cases, the distillation is operated at a continuous steady state.new feed is always being added to the distillation column and products are always being removed.