Search results
Results from the WOW.Com Content Network
In 1823 for the first time Jacob Berzelius discovered silicon tetrachloride (SiCl 4). [27] In 1846 Von Ebelman's synthesized tetraethyl orthosilicate (Si(OC 2 H 5) 4). [28] [27] Single crystal of silicon grown by the Czochralski process used to make integrated circuits. Silicon in its more common crystalline form was not prepared until 31 years ...
Wollaston discovered and isolated it from crude platinum samples from South America. [113] 53 Iodine: 1811 B. Courtois: 1811 B. Courtois Courtois discovered it in the ashes of seaweed. [114] The name iode was given in French by Gay-Lussac and published in 1813. [52] Davy gave it the English name iodine in 1814. [52] 3 Lithium: 1817 A. Arfwedson ...
Its discovery is generally believed to have originated in India around the 4th century AD, [65] although Singaporean mathematician Lam Lay Yong claims that the method is found in the Chinese text The Nine Chapters on the Mathematical Art, from the 1st century AD. [66] 60 AD: Heron's formula is discovered by Hero of Alexandria. [67]
American inventor Lee de Forest invented the triode. 1908: Scottish engineer Alan Archibald Campbell-Swinton, laid out the principles of television. 1909: Mica capacitor was invented by William Dubilier. 1911: Dutch physicist Heike Kamerlingh Onnes discovered Superconductivity. 1912: American engineer Edwin Howard Armstrong developed the ...
Its discovery was a serendipitous product of their continuing search for "near-Earth objects", and the "9" indicates that it was the ninth short-period comet (period less than 200 years) discovered by this team. [136] 1995 Top quark. The top quark is the third-generation up-type quark with a charge of +(2/3)e.
The following articles cover the timeline of United States inventions: . Timeline of United States inventions (before 1890), before the turn of the century Timeline of United States inventions (1890–1945), before World War II
Also, the sheepskin appears to be created during the 14th or 15th century -- hundreds of years after Polo's alleged trip to America. Also on AOL: 5,000-year-old monument found in Israel
The 13 British North American provinces of Virginia, Massachusetts Bay, Maryland, Connecticut, Rhode Island and Providence Plantations, New York, New Jersey, New Hampshire, Pennsylvania and Delaware, South Carolina, North Carolina, and Georgia united as the United States of America declare their independence from the Kingdom of Great Britain on ...