Torricelli experiment

Torricelli invented the mercury barometer, recorded in the books of Camille Flammarion (1923) Torricelli's experiment was a project carried out in 1643 by Italian physicist and chemist Evangelista Torricelli (1608-1647) in a laboratory that was able to measure atmospheric pressure for the first time. Torricelli filled a 1-meter-long tube (closed at one end) with mercury, and inverted it into a vat filled with mercury, immediately the mercury column fell several centimeters, remaining static about 76 cm 760 mm) in height as it influenced the atmospheric pressure.

As the pressure was directly proportional to the height of the mercury column (Hg), the mercury mm was adopted as a measure of pressure. conclusion

Torricelli concluded that the mercury column fell because the atmospheric pressure exerted on the surface of the mercury was able to balance the pressure exerted by its weights.

760 mmHg = 1 mpa

1 atm = 1.013 mbar o hPa

1 mbar or hPa = 0.7502467 mmHg

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