Table of Contents
What is Evangelista Torricelli famous for?
Evangelista Torricelli, (born Oct. 15, 1608, Faenza, Romagna—died Oct. 25, 1647, Florence), Italian physicist and mathematician who invented the barometer and whose work in geometry aided in the eventual development of integral calculus.
Why did Torricelli replace water with mercury?
Torricelli reasoned that it would have a natural pressure of its own. He then reasoned that his mercury tube was long enough that the weight of the mercury was greater than the atmospheric pressure, so when he upended it the mercury could no longer be held in and would fall, even if there was no air to replace it.
How did Evangelista Torricelli contribution to atomic theory?
Torricelli predicted that the height of the mercury column would change from day to day as the pressure of the atmosphere changed. Repeated experiments showed that the average pressure of the atmosphere at sea level is equal to the pressure of a column of mercury 760 mm tall.
Who invented mm Hg?
In the 17th century, Evangelista Torricelli conducted experiments with mercury that allowed him to measure the presence of air. He would dip a glass tube, closed at one end, into a bowl of mercury and raise the closed end up out of it, keeping the open end submerged.
Who invented the barometer answer?
History. Although Evangelista Torricelli is universally credited with inventing the barometer in 1643, historical documentation also suggests Gasparo Berti, an Italian mathematician and astronomer, unintentionally built a water barometer sometime between 1640 and 1643.
Who created mmHg?
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.
What was the most important invention of Evangelista Torricelli?
The most important of his inventions was the mercury barometer, which he devised while investigating the maximum suction abilities of water pumps. Torricelli carried out experiments using heavier and heavier liquids, resulting in an experiment that created a sustainable vacuum, using mercury, with a glass tube roughly one meter long.
When did Evangelista Torricelli publish the wind directions?
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. Torricelli observed prevailing wind directions for some time in the city of Florence and gathered reports from around Europe.
How did Torricelli contradict the theory of Galileo?
Torricelli’s explanation contradicted Galileo’s theory that the mercury column was held in the tube by the suction power of the vacuum above it. Galileo had also been contradicted by Giovanni Baliani of Genoa in 1630, who advanced similar ideas to Torricelli, albeit less developed, about the effects of air pressure.