Difference between mmwc and mmwg?
Submitted by: MtI hope that your question is the difference between mmwc (millimeter of water column) and mmHg (millimeter of Mercury column)
The force exerted by a water column of say 100 mm (ie. the force exerted by a water column of height 100 mm at the bottom point of unit
area ) is 100 mmwc. The pressure is defined as Force per unit area and the unit of pressure is mmwc. When the liquid column is replaced by Mercury then the pressure is measured as mmHg. The density of Hg(Mercury) is approximately 13.6 times greater than water and hence the pressure exerted by Hg column is 13.6 times greater than water column of same height.
Submitted by: S.venkatachalapathy
The force exerted by a water column of say 100 mm (ie. the force exerted by a water column of height 100 mm at the bottom point of unit
area ) is 100 mmwc. The pressure is defined as Force per unit area and the unit of pressure is mmwc. When the liquid column is replaced by Mercury then the pressure is measured as mmHg. The density of Hg(Mercury) is approximately 13.6 times greater than water and hence the pressure exerted by Hg column is 13.6 times greater than water column of same height.
Submitted by: S.venkatachalapathy
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