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20th Century Inventions Essay

702 words - 3 pages


The first working airplane was invented, designed, made, and flown by the Wright brothers, Wilbur Wright (1867-1912) and Orville Wright (1871-1948). Their "Wright Flyer" was a fabric-covered biplane with a wooden frame. The power to the two propellers was supplied by a 12-horsepower water-cooled engine. On December 17, 1903, the "Flyer" flew for 12 seconds and for a distance of 120 feet (37 m). The flight took place at Kitty Hawk, North Carolina, USA.

John Logie Baird (1888-1946) was a Scottish inventor and engineer who was a pioneer in the development of mechanical television. In 1924, Baird televised objects in outline. ...view middle of the document...

Radar is used to locate distant objects by sending out radio waves and analyzing the echos that return. Radar can determine where a distant object is, how big it is, what shape it has, how fast it's moving and in which direction it's going. Radar is now used to watch developing weather patterns, to monitor air traffic, to track ships at sea, and to detect missiles.

The first residential smoke alarm (also called a smoke detector) was designed in 1967 by BRK Electronics (this company would later sell the First Alert® brand of smoke detectors). These inexpensive, battery-operated devices received the Underwriters Laboratory approval in 1969. Smoke alarms have saved countless lives over the years, alerting people to fires.

Dr. Chien-Shiung Wu (Shanghai, China, May 31, 1912 - New York, USA, February 16, 1997) was a nuclear physicist who studied beta-decay (a weak interaction in which one of the neutrons in the nucleus of an atom decays into a proton and an electron; the proton enters the nucleus, forming an isotope, and the electron is emitted as a beta-particle). In...

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