How did Evangelista Torricelli invent the barometer?

Torricelli filled a four-foot long glass tube with mercury and inverted the tube into a dish. 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.

How did the first barometer work?

(The first barometer of this type was devised by Italian physicist and mathematician Evangelista Torricelli in 1643.) The barometer works by balancing the weight of mercury in the glass tube against the atmospheric pressure, much like a set of scales.

What is the most comfortable barometric pressure?

30 inches of mercury
Vanos said people are most comfortable with barometric pressure of 30 inches of mercury (inHg). When it rises to 30.3 inHg or higher, or drops to 29.7 or lower, the risk of heart attack increases.

Can the barometric pressure affect the human body?

Some people may be more sensitive to weather changes experiencing more stiffness, pain, and swelling with a barometric pressure decline. Scientists suggest that a fall in air pressure allows the tissues (including muscles and tendons) to swell or expand.

How did Evangelista Torricelli invent the mercury barometer?

Torricelli set up an experiment involving glass tubes filled with mercury (as it was denser than water) and thus became the first person to create a sustained vacuum. This led to the invention of the Mercury Barometer, an instrument used to measure atmospheric pressure.

Who was the first person to invent a barometer?

Evangelista Torricelli invented the first barometer. It was also known as the Torricelli’s Tube. He was born October 15, 1608, in Faenza, Italy. He was a physicist and mathematician. It was Galileo that suggested Evangelista Torricelli use mercury in his vacuum experiments.

How did Evangelista Torricelli invent the vacuum tube?

He was a physicist and mathematician. It was Galileo that suggested Evangelista Torricelli use mercury in his vacuum experiments. Torricelli filled a four-foot long glass tube with mercury and inverted the tube into a dish. Some of the mercury did not escape from the tube and Torricelli observed the vacuum that was created.

How did Louis Pascal invent the barometer?

One set measured mercury levels at the base and top of a tower in Paris, and one set measured mercury levels at various points along a mountain. In both cases, Pascal observed that the level of mercury in the tube changed in response to its height. These experiments proved that atmospheric pressure varies, depending on altitude.