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ENVIRSC 1A03 (130)
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Lecture

What is Atmospheric Pressure.docx
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Department
Environmental Science
Course
ENVIRSC 1A03
Professor
Luc Bernier
Semester
Winter

Description
What is atmospheric pressure? ­ Force exerted by air molecule per unit area ­ It is exerted by the gravitational force of the earth  of the two locations , which one has the highest atmospheric pressure and why? a) p1, because of the grater amount of overlying air b) p2, because f the greater amount of overlying air c) p1, because of the lower amount of  overlying air d) p2, because of the lower amount of overlying air What is the ideal gas law? ­ the law states:  o p = PRT o p = pressure (Pa) o P = air density (kg.m^3) o R = 287 (J/kg x K) o T = K o Near surface, often expressed as: temperature = constant x pressure If temperature increases, what will be the impact on pressure, according to the Law, air  density is held constant a) Pressure will increase b) Pressure will decrease c) Pressure will not change d) Pressure will increase at first, then decrease What is the relation between air pressure and altitude? ­ air pressure: decreases with altitude ­ near surface air pressure drops rapidly: with increasing altitude what will happen id a 30­cm hole suddenly occurs mid­air in the fuselage of an airliner? a) Pressure within the cabin will increase b) Pressure within the cabin will decrease c) Pressure within the cabin will not change d) Passengers will not experience any difference Air Pressure change and altitude  A mountain climber at the top of Mt.Everest is
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