Barometers have been used for almost 400 years to measure pressure changes in the atmosphere. The first known barometer was invented by Evangelista Torricelli (1608-1647), a student of Galileo during his fi nal years in Florence, Italy. The height of a liquid in a barometer is directly proportional to the atmospheric pressure, or P=(rgh) where P is the pressure, r is the density of the barometer fluid, and his the height of the liquid column. For mercury barometers, the density of the fluid is 13,560 kg/m3. On the surface of the earth, the acceleration due to gravity, g, is approximately 9.8 m/s2. Thus, the only variable in the equation is the height of the fluid column, h, which should have the unit of meters.

Barometers have been used for almost 400 years to measure pressure changes in the atmosphere. The first known barometer was invented by Evangelista Torricelli (1608-1647), a student of Galileo during his fi nal years in Florence, Italy. The height of a liquid in a barometer is directly proportional to the atmospheric pressure, or P=(rgh) where P is the pressure, r is the density of the barometer fluid, and his the height of the liquid column. For mercury barometers, the density of the fluid is 13,560 kg/m3. On the surface of the earth, the acceleration due to gravity, g, is approximately 9.8 m/s2. Thus, the only variable in the equation is the height of the fluid column, h, which should have the unit of meters.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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