Barometry
Atmospheric Pressure
Pressure can also be thought of as energy per unit volume since the pressure exerted on a surface is a result of millions of these ìhitsî by molecules and the number of hits, (which is determined by density), and the force with which the molecules hit, (determined by their kinetic energy), determines the pressure exerted.
We can then say that atmospheric pressure is dependent on:
Sea Level Pressure
ASOS Sea Level Pressure Calculations
Ps is determined from the equation:
General Errors of Pressure Measurements
Direct and Indirect Pressure Measurements
A. Direct Pressure Measurements
PPT Slide
1. Mercury Barometers
Characteristics of Mercury
Corrections to Mercury Barometers
Thermal Correction
If standard temperature for both mercury and scale are both 0oC, then the pressure corrected for temperature is:
Gravity Correction
Common Mercurial Barometers
Diagram of the National Physics Laboratory Normal Barometer
New Normal Barometer
Another Adjustable Cistern Barometer
Reading the Fortin Barometer
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Email: alcorn@ariel.met.tamu.edu
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