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ENVIRSC 1A03 (130)
Luc Bernier (125)
Lecture

2. Atmospheric Pressure.docx

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Department
Environmental Science
Course
ENVIRSC 1A03
Professor
Luc Bernier
Semester
Winter

Description
ENVIR SCI 1A03 January 13, 2014 Atmospheric Pressure and Density • What is atmospheric pressure? o Force exerted by air molecules per unit area o What triggers atmospheric pressure? – air is being pulled down by earth’s gravitational field. o 2 locations: up a mountain and down a valley - - which one has a higher atmospheric pressure? Valley because of the greater amount of overlying air (the distribution of air molecules is mostly found in the valley area) • Ideal Gas Law used to determine atmospheric pressure o P=ρRT o P = pressure (Pa) o ρ= air density (kg/m3) Temperatu
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