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In order to avoid capillary correction, the minimum diameter of a manometer used for measuring pressure, should be
In order to avoid capillary correction, the minimum diameter of a manometer used for measuring pressure, should be
For a tube of diameter more than 6 mm (radius > 3 mm) the capillary rise is negligible therefore In order to prevent the capillary action from affecting the column of liquid in a piezometer the diameter of the glass tube should be greater than 6 mm.