The universe unraveled by HannaH

The universe unraveled by HannaH

“Bei allen zweifelhaften Fragen ist Glauben die Sache des Unwissenden, Entscheiden die des Halbgelehrten, Prüfen und Suchen die des wahren Kenners." Herr Professor Webers Erdinduktor.


Brachistochrone curve

Walter RussellPosted by Hanne Thu, January 11, 2018 11:05:51

Curve studied and named by Jean Bernoulli in 1718 and Euler in 1736.
The curve (called brachistochrone) that minimises the travel time of a point moving freely along this curve, when it is itself turning around a fixed centre O at constant speed, in the case where the speed of the moving point vanishes at O, is a logarithmic spiral.








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