.... should be kept under petroleum or other suitable oxygen-free liquids to exclude air. is used mostly with other elements. It is used in metallurgy, and its some of its compounds are used in pyrotechnics, and petroleum mining. Another one of its uses is as a getter in vacuum tubes. ’s sulfate is used in paint and in glassmaking. Barite is extensively used as a weighing agent in oilwell drilling fluids. The carbonate has been used as a rat poison, while nitrate and chlorate give colors in pyrotechny. The impure sulfide of radiantly glows after exposure to the light. metal has few practical applications, although it is sometimes used in coating electrical conductors in e ....

.... anywhere from 4.7GB to 17GB, compared with a CD's 650MB. But DVD is more than just higher capacity, which is partly why things get so complicated. DVD is a critical element of PC/TV convergence, since it's a way to distribute movies with extended features such as user-selectable camera angles and multiple language support. Also, like CD's, there are writeable and rewriteable variations coming. DVD is just starting to make a significant impact on the market. Estimates vary from about 600,000 to 1,000,000 console players ("living room" boxes used strictly to play movies) sold in the United States through the end of 1998. So far, the number of DVD drives in PCs ....

.... to step up the pace of renewal and regeneration to make our inner cities much better places to live, work, and invest”. The inner city programme specified 6 aims: - to enhance job prospects and the ability of residents to compete for them - to bring land and buildings back into use - to improve housing conditions - to encourage private sector investment - to encourage self-help and improve social fabric, and - to improve environmental quality. The Government also set up programmes which would help these aims to be met, such as the Urban Development Corporations (e.g. LDDC London Docklands Development Corporation) and the availability of grants for urban develop ....

.... trash in the ocean on a daily basis. In 1993, the Center for Marine Conservation sponsored a nation-wide beach clean-up. Volunteers collected over 7 million pieces of trash.1 The worst offenders are commercial ships. The world fleet of commercial boats dump over 5,550,000 plastic, metal, and glass containers into the ocean in a single day.2 The most harmful of these is plastic. Sea mammals such as birds and dolphins often get tangled in the plastic six-pack rings, fishing lines, and net that humans discard into the ocean waters. Once entangled, they are unable to free themselves which can cause deep cuts, starvation, and drowning. Many ocean mammals have died as a result of i ....

.... Sudan almost immediately afterwards. The third out break in Sudan in 1979 was smaller with 22 deaths out of the 34 cases. The first outbreaks in Zaire and western Sudan were large resulting in 340 deaths out of the 550 cases. The most recent outbreak is in Kikwit, Zaire. The outbreak appears to have started with a patient who had surgery in Kikwit on April 10, 1995. Members of the patient's surgical team developed symptoms similar to those of a viral hemorrhagic fever disease. The symptoms of Ebola hemorrhagic fever begin 4 to 16 says after infection. Victims develop fever, chills, headaches, muscle aches, and loss of appetite. The patient will suffer vomiting, dia ....

.... be trapped resulting in the warming of the earth. One great example of the Greenhouse Effect is the planet Venus. Venus's atmosphere had a thick layer of CO2, giving the planet's surface a temperature warm enough to melt lead. So What Does All This "Greenhouse" Stuff Have To Do With Me? As the temperatures rise, the waters get warmer and begin the melting process of the polar ice caps (Popular Science). Long term predictions of Global warming say that the melting of the polar ice caps will continue causing ocean waters to rise, resulting in massive coastal flooding of major cities such as Los Angeles and Miami. If the next century's warming stays at a low end of estima ....

.... which had originally been built during World War II. The F-16 Fighting Falcon, when it first came out, was designed to be in the Air Forces lightweight fighter (LWF) program. The first F-16 was developed as a YF-16 prototype back in 1972. It made it’s first official flight on February 2, 1974. A level speed of Mach 2 at 40,000 ft was attained on March 11, 1974. The production F-16A differed from the YF-16 in having a 13-inch fuselage extension to hold more fuel and the Westinghouse APG-66 radar. The wing area was increased by 20 square feet and an additional underwing hardpoint was fitted. The first YF-16 was brought out on December 13, 1973 to make its fi ....

.... for measuring and then proved successful. As a result, a Frenchman, sieur de St. Pierre, frowned on the moons of Jupiter as means of determining . He theorized that could be found by the position of the moon and select stars. At the time, Dr. Edmond Halley proved this theory wrong. After many observations, Halley concluded that the moon’s rate of revolution around the earth was accelerating overtime. John Harrison was a simple clockmaker and a self-educated person who was accredited for finding by means of a timekeeper. John built his first pendulum watch in 1713. It was constructed entirely out of wood. Harrison called his first sea clock Harrison’s N ....