Atmospheric pressure forces the mercury to rise up the tube. At sea level, the column of mercury will rise (on average) to a height of 29.92 inches or 760 millimeters. Why not use water instead of ...

The pressure at sea level is about 14.7 pounds per square inch, which you can't feel, according to the National Ocean Service, which is part of NOAA. But as you dive deeper, the hydrostatic ...

2). Overall, we find that anthropogenic greenhouse gases and sulphate aerosols have had a detectable influence on sea-level pressure over the second half of the twentieth century: this represents ...