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History
Hydraulic head
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Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum.
Measuring hydraulic head in an artesian aquifer, where the water level is above the ground surface
Measuring hydraulic head in an artesian aquifer, where the water level is above the ground surface
Pressure
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Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure is the pressure relative to the ambient pressure.
Mercury column
Mercury column
The effects of an external pressure of 700 bar on an aluminum cylinder with 5 mm (0.197 in) wall thickness
The effects of an external pressure of 700 bar on an aluminum cylinder with 5 mm (0.197 in) wall thickness
Water escapes at high speed from a damaged hydrant that contains water at high pressure
Water escapes at high speed from a damaged hydrant that contains water at high pressure
Low-pressure chamber in Bundesleistungszentrum Kienbaum, Germany
Low-pressure chamber in Bundesleistungszentrum Kienbaum, Germany