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lecture03-pressure and gauges

# lecture03-pressure and gauges - So far Density average...

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So far … Density, average density, specific gravity pressure, p = F/A causes of pressure today Pascal’s principle measurement of pressure small note: please look at and use the Vista discussion board before emailing

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Pressure in a Fluid Fluid pressure is the pressure exerted by a fluid at any point within the body of a fluid and the walls of confining vessel. Where does this pressure come from ? 1. The weight of the fluid (gravity) – liquid 2. Collisions among the constituents (atoms and molecules) and between the constituents and the walls of the confining vessel – gas
Atmospheric Pressure Atmospheric pressure at any location on earth s surface is due to the weight of the air above that location. Standard atmospheric pressure (P 0 ) is P 0 = 1.01 × 10 5 N/m 2 or Pa making air pressure visible: (barometer) video

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same principle applies to a suction cup F air = p 0 A cup
Atmospheric Pressure Atmospheric pressure at any location on earth s surface is due to the weight of the air above that location. Standard atmospheric pressure (P 0 ) is P 0 = 1.01 × 10 5 N/m 2 or Pa Yes, go to the top of a mountain and the air pressure is lower.

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