Periodic Table of Elements ... at home

Up to the XIII century, people knew only nine chemical elements: seven metals - gold, silver, copper, tin, iron, lead and mercury, as well as two non-metals - sulfur and carbon.

Women's Day

March 8th - it is the one of our favorite holidays. Over the years, this holiday exalts the woman, her beauty, tenderness and love, something changed and transformed into various socio-political forms.

Mystery of Carnot's theorem

Perhaps there’s no polytechnics who would not know about Carnot's theorem, according to which the efficiency of the Carnot heat engine does not depend on the nature of the working fluid.

Engineer and inventor James Watt

January 19 marks 270 years since the birth of James Watt (1736-1819), English inventor, whose name is called watt power unit. Improvement of the steam engine made by Watt, was one of the most outstanding events in the history of technology.

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