Search results
Results from the WOW.Com Content Network
Tungsten (also called wolfram) [12][13] is a chemical element; it has symbol W and atomic number 74. It is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a distinct element in 1781 and first isolated as a metal in 1783.
Chicago has played a central role in American economic, cultural and political history. Since the 1850s Chicago has been one of the dominant metropolises in the Midwestern United States, and has been the largest city in the Midwest since the 1880 census. The area's recorded history begins with the arrival of French explorers, missionaries and ...
Demon core. A re-creation of the experiment involved in the 1945 incident. The sphere of plutonium is surrounded by tungsten carbide blocks acting as neutron reflectors. The demon core was a sphere of plutonium that was involved in two fatal radiation accidents when scientists tested it as a fissile core of an early atomic bomb.
Culture of Chicago. The culture of Chicago, Illinois is known for the invention or significant advancement of several performing arts, including improvisational comedy, house music, industrial music, blues, hip hop, gospel, jazz [1] and soul. [2] The city is known for its Chicago School and Prairie School architecture.
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering [7] for use in industrial machinery, cutting tools, chisels, abrasives, armor-piercing bullets and jewelry.
Sam Carver is on thin ice at Firehouse 51. During last week’s Chicago Fire, the firefighter made more than one misstep on the job, prompting his lieutenant Stella Kidd to send him home with a ...
16,325. ZIP code. 60616. Chinatown is a neighborhood on the South Side of Chicago, along S. Wentworth Avenue between Cermak Road and W. 26th St. Over a third of Chicago's Chinese population resides in this ethnic enclave, making it one of the largest concentrations of Chinese-Americans in the United States. [3]
Refractory metals. Refractory metals are a class of metals that are extraordinarily resistant to heat and wear. The expression is mostly used in the context of materials science, metallurgy and engineering. The definition of which elements belong to this group differs. The most common definition includes five elements: two of the fifth period ...