Was sagt hPa aus?
Er ist definiert als das Gewicht der Luftsäule pro Flächeneinheit vom Erdboden bis zur äußeren Grenze der Atmosphäre. In Meeresniveau sind das im Durchschnitt 1013,2 Hektopascal ( hPa ). Gebräuchlich ist die Einheit Millibar (mbar) , wobei 1 Millibar= 1 hPa beträgt.
Was ist ein Quecksilberbarometer?
Quecksilberbarometer. Ein Quecksilberbarometer besteht aus einem U-förmig gebogenen Glasrohr, in dem sich Quecksilber befindet (Bild 3). In dem einen (linken) Schenkel des Rohres wirkt der Druck des Quecksilbers, in dem anderen (rechten), nicht abgeschlossenen Rohr wirkt der Luftdruck.
How old was Evangelista Torricelli when he was born?
Evangelista Torricelli was born on October 15, 1608 in the great Italian city of Rome. His mother was Giacoma Ruberti (born Torricelli). His father was Gaspare Ruberti, a weaver. Evangelista was the eldest of their three sons; he took his mother’s surname – it was not exceptionally rare in Rome for children to do this.
When did Evangelista Torricelli invent the mercury barometer?
The Invention. He became the first scientist to create a sustained vacuum and to discover the principle of a barometer. Torricelli realized that the variation of the height of the mercury from day to day was caused by changes in the atmospheric pressure. Torricelli built the first mercury barometer around 1644.
When did Evangelista Torricelli invent the experiment?
Torricelli’s experiment was invented in Pisa in 1643 by the Italian scientist Evangelista Torricelli (1608-1647).
What did Evangelista Torricelli say about the wind?
In Torricelli’s day people believed that the wind was caused by vapors released by the damp earth. Torricelli gave the correct explanation as part of a series of lectures. These were published in 1823, long after his death, as Lezioni accademiche di Evangelista Torricelli.