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Preethum Prithviraj

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last 3 solved tasks
If c4b5b + b0b3b = aa4484 find number abc. Multiple solutions may exist.
What falls often but never gets hurt?
Find the country and its capital city, using the move of a chess knight. First letter is S. Length of words in solution: 5,8.

Vacuum tube

In 1906, Dr. Lee DeForest (26 Aug 1873 - 30 Jun 1961), one of the “fathers of radio,'' announced his three-element electrical vacuum tube (now known as a triode) to a meeting of the American Institute of Electrical Engineers He had discovered that when a mesh, or grid, of wire was placed between the filament and collector “plate” in a diode tube (first made by J. Ambrose Fleming, 1904), a large voltage-amplifying effect could be produced. DeForest patented this vacuum tube on 15 Jan 1907. The ability of this tube to amplifiy weak signals was an invention as great as radio itself, because it made long-distance communication possible.[Image: early DeForest Audion]

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