Evangelista Torricelli, one of the first to discover atmospheric pressure, once said, "We live submerged at the bottom of an ocean of the element air." The Earth's gravitational field is pulling ...

Aristotle suggested that air was one of four elements that also included earth, water ... which measures atmospheric pressure (a measure of the pressure exerted by the atmosphere on a surface).

At sea level, there is 101,000 N of air above every metre squared of the Earth’s surface. Atmospheric pressure decreases as the height of a surface above ground level increases. This is because ...