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Car audio/video (car AV) is a sound or video system fitted in an automobile. In 1930, the Galvin Corporation introduced the first commercial car radio, the Motorola model 5T71, which sold for between $110 and $130 and could be installed in most popular automobiles. Inventors Paul Galvin and Joe Galvin came up with the name Motorola when their ...
The Lower Paleolithic period lasted over 3 million years, during which there many human-like species evolved including toward the end of this period, Homo sapiens.The original divergence between humans and chimpanzees occurred 13 (), however interbreeding continued until as recently as 4 Ma, with the first species clearly belonging to the human (and not chimpanzee) lineage being ...
Hub van Doorne (1900–1979), Netherlands – Variomatic continuously variable transmission; John Thompson Dorrance (1873–1930), U.S. – Condensed soup; Amanda Minnie Douglas (1831–1916) – writer and inventor (portable folding mosquito net frame) Charles Dow (1851–1902), U.S. – Dow Jones Industrial Average
Electrically operated display devices have developed from electromechanical systems for display of text, up to all-electronic devices capable of full-motion 3D color graphic displays. Electromagnetic devices, using a solenoid coil to control a visible flag or flap, were the earliest type, and were used for text displays such as stock market ...
1930: Subrahmanyan Chandrasekhar discovers his eponymous limit of the maximum mass of a white dwarf star; 1931: Kurt Gödel: incompleteness theorems prove formal axiomatic systems are incomplete; 1932: James Chadwick: Discovery of the neutron; 1932: Karl Guthe Jansky discovers the first astronomical radio source, Sagittarius A
Image credits: Photoglob Zürich "The product name Kodachrome resurfaced in the 1930s with a three-color chromogenic process, a variant that we still use today," Osterman continues.
In very successful presentations between 1887 and 1890, four to seven spectators at a time would watch the images on a 12.5 centimeter wide milk-glass screen in a window in a wall of a small darkened room. In 1890, Anschütz introduced a long cylindrical automated version with six small screens.
Engineers during World War Two test a model of a Halifax bomber in a wind tunnel, an invention that dates back to 1871. The following is a list and timeline of innovations as well as inventions and discoveries that involved British people or the United Kingdom including predecessor states in the history of the formation of the United Kingdom ...