When we say that, for example, 0.55″ of rain has fallen, we mean a blanket of water exactly 0.55″ in depth would cover all horizontal surfaces if none of the rainwater had soaked in, run off or ...

There’s no such thing as a complete vacuum. Even in the cosmic void between galaxies, there’s an estimated density of about one hydrogen or helium atom per cubic meter. But these estimates are largely ...

The tube is 20 inches long but only holds two inches worth of rain. Getting those precise measurements is possible because ...

Pressure is the amount of force applied per unit area. Pressure can be measured by a pressure gauge, but it is important to know the type of pressure the gauge is reading. This article will cover the ...

A new way of measuring sea level using satellite navigation system signals, for instance GPS, has been implemented by scientists at Chalmers University of Technology in Sweden. Sea level and its ...