Georg Ohm

Published April 01, 2018

Georg Ohm

The German physicist Georg Ohm (1787-1854), who discovered Ohm's law, familiar to all schoolchildren today, in 1826 for publishing a short article in which a well-known law was being published, the Cologne school teacher Georg Ohm was dismissed from work on personal instructions Minister of Education. The minister was convinced...

Wheel

Published April 01, 2018

Wheel

The first wheel - it was an ice rink. In Ancient Egypt builders of pyramids to facilitate movement They put round logs under huge stone blocks. After several centuries, two round logs, cut off from a log, were connected by an axis...

Laser

Published April 01, 2018

Laser

Laser - a short and unusually popular nowadays word became the common name of a huge class of devices that were so widely used in science and technology that, following the expression "atomic age" in our lexicon, the expression "laser age". The idea of creating lasers was first proposed by the Soviet scientist V.A. Fabrikant owner was in 1940...

Metals

Published April 01, 2018

Metals

Of 107 known chemical elements of the Periodic System of Chemical Elements 85 - metals and only 22 - non-metals. Metals such as gold, silver and copper, are known man since prehistoric times. In the ancient and middle ages it was believed that there are only 7 metals (gold, silver, copper, tin, lead, iron and mercury). M.V. Lomonosov defined metal as...

Soap bubble

Published April 01, 2018

Soap bubble

All, it would seem, told about the soap bubble in his poems S. Ya. Marshak. There is even a hint of a figurative meaning when one says about a person: "It was puffed up like a soap bubble!" But the soap bubble has not only thin glory. English scientist Lord Kelvin, who lived in the last century, once said...

Nikola Tesla

Published April 01, 2018

Nikola Tesla

An outstanding engineer and inventor Nikola Tesla, a Serb by nationality, was born in a mountain village on the land of the former Yugoslavia. He studied at the Higher Technical School in Graz and at the University of Prague. He began working as a telegraph operator in Budapest, and the first improvements made by him concern telegraph...

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