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30 inches of water column is equivalent to approximately 746.7 millimeters of mercury.
To convert inches of water column to volume, you would need to know the area over which the water column is acting. Once you have the area, you can calculate the volume by multiplying the inches of water column by the area in square inches. The formula would be: Volume = Inches of water column * Area.
It is 0.000039 inches, approx.
14 inches equals one pound of natural gas pressure
Blood pressure is usually expressed in terms of the systolic (maximum) pressure over diastolic (minimum) pressure and is measured in millimeters of Mercury (mm Hg).
Water is not suitable for use in a barometer because it is too dense and heavy, which would require a very tall column to measure small changes in atmospheric pressure accurately. Additionally, water can easily evaporate and create inaccuracies in the measurements. Mercury is traditionally used in barometers because it is dense, does not easily evaporate, and provides a more practical measurement system.