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The Rothschild family (/ ˈ r ɒ θ (s) tʃ aɪ l d / ROTH(S)-chylde German: [ˈʁoːt.ʃɪlt]) is a wealthy Ashkenazi Jewish noble banking family originally from Frankfurt that rose to prominence with Mayer Amschel Rothschild (1744–1812), a court factor to the German Landgraves of Hesse-Kassel in the Free City of Frankfurt, Holy Roman Empire, who established his banking business in the 1760s.
- Western Europe (mainly United Kingdom, France, and Germany)
- 1760s (1577)
Inter IKEA Systems B.V., [6] [7] trading as IKEA ( / aɪˈkiːə / eye-KEE-ə, Swedish: [ɪˈkêːa] ), is a Swedish multinational conglomerate that designs and sells ready-to-assemble furniture, kitchen appliances, decoration, home accessories, and various other goods and home services. Started in 1943 by Ingvar Kamprad and currently legally ...
- Etymology and Pronunciation
- History
- Extraction
- Metal and Its Alloys
- Production
- Characterization
Metallurgy derives from the Ancient Greek μεταλλουργός, metallourgós, "worker in metal", from μέταλλον, métallon, "mine, metal" + ἔργον, érgon, "work" The word was originally an alchemist's term for the extraction of metals from minerals, the ending -urgy signifying a process, especially manufacturing: it was discussed in this sense in the 1797 Enc...
The earliest recorded metal employed by humans appears to be gold, which can be found free or "native". Small amounts of natural gold have been found in Spanish caves dating to the late Paleolithic period, 40,000 BC. Silver, copper, tin and meteoric iron can also be found in native form, allowing a limited amount of metalworking in early cultures. ...
Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form. In order to convert a metal oxide or sulphide to a purer metal, the ore must be reduced physically, chemically, or electrolytically. Extractive metallurgists are interested in three primary streams: feed, concentrat...
Much effort has been placed on understanding iron–carbon alloy system, which includes steels and cast irons. Plain carbon steels (those that contain essentially only carbon as an alloying element) are used in low-cost, high-strength applications, where neither weight nor corrosion are a major concern. Cast irons, including ductile iron, are also pa...
In production engineering, metallurgy is concerned with the production of metallic components for use in consumer or engineering products. This involves production of alloys, shaping, heat treatment and surface treatment of product. The task of the metallurgist is to achieve balance between material properties, such as cost, weight, strength, tough...
Metallurgists study the microscopic and macroscopic structure of metals using metallography, a technique invented by Henry Clifton Sorby. In metallography, an alloy of interest is ground flat and polished to a mirror finish. The sample can then be etched to reveal the microstructure and macrostructure of the metal. The sample is then examined in an...
American retail corporation Walmart has been the world's largest company by revenue since 2014. [1] The list is limited to the largest 50 companies, all of which have annual revenues exceeding US$130 billion. This list is incomplete, as not all companies disclose their information to the media and/or general public. [3]
Artist Michelangelo Buonarroti Year 1498–1499 Type Marble Subject Jesus and Mary Dimensions 174 cm × 195 cm (68.5 in × 76.8 in) Location Saint Peter's Basilica, Vatican City The Madonna della Pietà (Italian:; 1498–1499), informally known as La Pietà, is a marble sculpture of Jesus and Mary at Mount Golgotha representing the "Sixth Sorrow" of the Blessed Virgin Mary by Michelangelo ...
Ernest Miller Hemingway ( / ˈɜːrnɪst ˈhɛmɪŋweɪ /; July 21, 1899 – July 2, 1961) was an American novelist, short-story writer and journalist. Best known for an economical, understated style that significantly influenced later 20th-century writers, he is often romanticized for his adventurous lifestyle, and outspoken and blunt public ...
George Washington (February 22, 1732 – December 14, 1799) was an American Founding Father, military officer, and politician who served as the first president of the United States from 1789 to 1797. Appointed by the Second Continental Congress as commander of the Continental Army in 1775, Washington led Patriot forces to victory in the American Revolutionary War and then served as president ...
