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Pressure!. Pressure Defined Force per unit area Force is a push or pull  Units of force are Newtons P = F/a Measured with a barometer.

Published byKristina James Modified over 9 years ago

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Presentation on theme: "Pressure!. Pressure Defined Force per unit area Force is a push or pull  Units of force are Newtons P = F/a Measured with a barometer."— Presentation transcript:

1 Pressure!

2 Pressure Defined Force per unit area Force is a push or pull  Units of force are Newtons P = F/a Measured with a barometer

3 Barometers Mercury barometer Anaeroid barometer

4 Units of Pressure Millimeters of mercury  Mercury rises 760 mm at sea level  Torricelli (Torr) units are the same size Atmospheric pressure  Pressure at sea level is 1 atmo Pascal  1 N/ 1 m 2

5 Standard Temperature and Pressure STP Exactly 1 atmo and 0 o C Gases commonly measured at this standard T and P condition

6 Sample Problem 10-1 The average atmospheric pressure in Denver, Colorado is 0.830 atmo. Express this in:  mm Hg  kPa

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