Gases. Pressure Is caused by the collisions of molecules with the walls of a container is equal to force/unit area SI units = Newton/meter 2 = 1 Pascal.
Chapter 09--The Etruscans Double-flute player, detail of a mural painting in the Tomb of the Leopards, Tarquinia, Italy, ca. 480-470 BCE.
Caleb L Sutton CV