lifting-surface area
41Venus — This article is about the planet. For other uses, see Venus (disambiguation). Venus   …
42metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… …
43Decompression (diving) — Divers decompressing in the water at the end of a dive Decompression in the context of diving derives from the reduction in ambient pressure experienced by the diver during the ascent at the end of a dive or hyperbaric exposure and refers to both …
44Oil well — The pumpjack, such as this one located south of Midland, Texas, is a common sight in West Texas. An oil well is a general term for any boring through the earth s surface that is designed to find and acquire petroleum oil hydrocarbons. Usually… …
45Avrocar — infobox Aircraft name =VZ 9 AV Avrocar type =experimental proof of concept vehicle manufacturer =Avro Aircraft Ltd. (Canada) caption = The Avrocar S/N 58 7055 (marked AV 7055 ) on its rollout. designer =John Frost first flight =12 November 1959… …
46Sailing hydrofoil — A sailing hydrofoil or hydrosail is a sailboat with wing like foils mounted under the hull. As the craft increases its speed the hydrofoils lift the hull up and out of the water, greatly reducing wetted area, resulting in decreased drag and… …
47AGRICULTURAL LAND-MANAGEMENT METHODS AND IMPLEMENTS IN ANCIENT EREẒ ISRAEL — Ereẓ Israel is a small country with a topographically fragmented territory, each geographical region having a distinctive character of its own. These regions include: the coastal plain, the lowlands, the hilly country, the inland valleys, the… …
48flight, history of — ▪ aviation Introduction development of heavier than air flying machines. Important landmarks and events along the way to the invention of the airplane include an understanding of the dynamic reaction of lifting surfaces (or wings), building… …
49Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …
50Elephant — Taxobox name = Elephant image width = 250px image caption = An African Bush Elephant near the border of the Serengeti and Ngorongoro Conservation Area in Tanzania. regnum = Animalia phylum = Chordata subphylum = Vertebrata classis = Mammalia ordo …
