total cross-sectional area coverage
21DDT — For other uses, see DDT (disambiguation). DDT …
22Post-invasion Iraq, 2003–present — Infobox Military Conflict campaign=Iraq War, Post Invasion caption=Occupation zones in Iraq as of September 2003 date=May 1, 2003 – present place=Iraq casus=2003 invasion of Iraq result=Conflict ongoing combatant1=flagicon|Iraq New Iraqi Army… …
23Dental amalgam controversy — Dental amalgam filling The dental amalgam controversy refers to the conflicting views over the use of amalgam as a filling material mainly because it contains the element mercury. The concern centers on the health effects of toxicity or allergy… …
24Chernobyl disaster — This article is about the 1986 nuclear plant accident in Ukraine. For other uses, see Chernobyl (disambiguation). Chernobyl disaster …
25Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …
26Iraq Body Count project — The Iraq Body Count project (IBC) is one of several efforts to record civilian deaths attributable to coalition and insurgent military action, sectarian violence and criminal violence in Iraq since the US led 2003 invasion of Iraq. This refers to …
27Reflection high energy electron diffraction — (RHEED) is a technique used to characterize the surface of crystalline materials. RHEED systems gather information only from the surface layer of the sample, which distinguishes RHEED from other materials characterization methods that rely also… …
28Multifunction cardiogram — Multifunction CardioGramTM (MCGTM) is an FDA and AMA approved diagnostic tool used to diagnose myocardial ischemia due to Coronary Artery Disease (CAD). MCG records resting ECG data between the Myocardium and intra cardiac blood flow to… …
29United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
30United Kingdom — a kingdom in NW Europe, consisting of Great Britain and Northern Ireland: formerly comprising Great Britain and Ireland 1801 1922. 58,610,182; 94,242 sq. mi. (244,100 sq. km). Cap.: London. Abbr.: U.K. Official name, United Kingdom of Great… …
