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20th-century percussion instruments (21 P) Pages in category "20th-century inventions" The following 128 pages are in this category, out of 128 total.
The timeline of historic inventions is a chronological list of particularly significant technological inventions and their inventors, ... 20th century. 1900s
The 20th century saw mathematics become a major profession. As in most areas of study, the explosion of knowledge in the scientific age has led to specialization: by the end of the century there were hundreds of specialized areas in mathematics and the Mathematics Subject Classification was dozens of pages long. [72]
Between the 7th and 12th century, the military of the Byzantine Empire had a secret weapon that made them virtually unbeatable in naval battles. That weapon was called Greek Fire. What was Greek Fire?
The electric flash-lamp is a device that uses an electrical circuit to trigger a fuse to ignite explosive powder such as magnesium, for a brief sudden burst of bright light "flash" from a chemical reaction of flash powder burning. It was principally used for flash photography in the early 20th century, but had other uses as well.
7 20th century. 8 21st century. 9 See also. 10 References. Toggle the table of contents. ... 1948 – Invention of the maser and laser by Charles Townes; 1948 ...
The past half-century has produced some of the most significant and astounding inventions ever developed in human history, and many notable ones came to life in the United States.
Timeline of historic inventions; Technological revolution; ... The Machine Age [1] [2] [3] is an era that includes the early-to-mid 20th century, sometimes also ...