Template:Selected anniversaries/August 20: Difference between revisions
No edit summary |
No edit summary |
||
| Line 61: | Line 61: | ||
||1936: Edward Weston dies ... American chemist noted for his achievements in electroplating and his development of the electrochemical cell, named the Weston cell, for the voltage standard. Pic. | ||1936: Edward Weston dies ... American chemist noted for his achievements in electroplating and his development of the electrochemical cell, named the Weston cell, for the voltage standard. Pic. | ||
||1939: Agnes Giberne dies ... astronomer and author ... prolific British author who wrote fiction with moral or religious themes for children and also books on astronomy for young people. Pic: book illustration of midnight on Saturn. | |||
File:Plutonium pellet.jpg|link=Plutonium (nonfiction)|1942: The first visible quantity of a [[Plutonium (nonfiction)|plutonium compound]], plutonium(IV) iodate, is isolated by nuclear chemists Burris Cunningham and Louis Werner. | File:Plutonium pellet.jpg|link=Plutonium (nonfiction)|1942: The first visible quantity of a [[Plutonium (nonfiction)|plutonium compound]], plutonium(IV) iodate, is isolated by nuclear chemists Burris Cunningham and Louis Werner. | ||
||1944: Leon Chwistek dies ... avant-garde painter, theoretician of modern art, literary critic, logician, philosopher and mathematician. | ||1944: Leon Chwistek dies ... avant-garde painter, theoretician of modern art, literary critic, logician, philosopher and mathematician. Pic: portrait by Witkacy, 1913. | ||
||1953: The Soviet Union released the news that it had detonated its first hydrogen bomb. U.S. scientists identified it took place eight days earlier (12 Aug 1953), in Kazakhstan. The Soviet device had their own “layer cake” design of lithium-6 deuteride and tritium fuel layered with uranium. The explosion, with a yield of 400 kilotons (about 30 times the power of the bomb dropped on Japan, 6 Aug 1945), came less than 10 months after the first U.S. bomb test, Mike, (1 Nov 1952) announced by President Harry Truman on 7 Jan 1953. Notably, the Soviet bomb was more portable than the U.S. device—small enough to fit in a plane, and be easily weaponizeable, though its size limited the amount of thermonuclear fuel and explosive force. It was dubbed “Joe-4” in the U.S. The American test was designed for greater explosive power. | ||1953: The Soviet Union released the news that it had detonated its first hydrogen bomb. U.S. scientists identified it took place eight days earlier (12 Aug 1953), in Kazakhstan. The Soviet device had their own “layer cake” design of lithium-6 deuteride and tritium fuel layered with uranium. The explosion, with a yield of 400 kilotons (about 30 times the power of the bomb dropped on Japan, 6 Aug 1945), came less than 10 months after the first U.S. bomb test, Mike, (1 Nov 1952) announced by President Harry Truman on 7 Jan 1953. Notably, the Soviet bomb was more portable than the U.S. device—small enough to fit in a plane, and be easily weaponizeable, though its size limited the amount of thermonuclear fuel and explosive force. It was dubbed “Joe-4” in the U.S. The American test was designed for greater explosive power. | ||
Revision as of 16:26, 25 March 2019
1672: Mathematician and politician Johan de Witt dies in a riot. The rioters will partially eat his body.
1911: The first cable message sent around the world from the U.S. by commercial telegraph was transmitted from New York City. It read “This message sent around the world,” left the New York Times building at 7:00 pm and was received at 7:16 pm after travelling nearly 29,000 miles through 16 relays via the Azores, Gibraltar, India, Phillipines, Midway, Guam, Hawaii and San Francisco.
1912: Thomas Edison receives U.S. patent No. 1036470 for a “Phonographic Apparatus,” and No. 1036471 for a “Storage Battery.”
1923: Miniaturized version of John Ambrose Fleming delivers lecture from within Fleming tube.
1942: The first visible quantity of a plutonium compound, plutonium(IV) iodate, is isolated by nuclear chemists Burris Cunningham and Louis Werner.
1961: Physicist and academic Percy Williams Bridgman dies. He won the 1946 Nobel Prize in Physics for his work on the physics of high pressures.
1962: Mathematician and crime-fighter Alice Beta publishes new class of Gnomon algorithm functions which detect and prevent crimes against mathematical constants.