A significant part of aeronautical science is a branch of dynamics called aerodynamics, which deals with the motion of air and the way that it interacts with objects in motion, such as an aircraft.
When you pour a liquid from one container to another, the liquid takes the shape of the container. The volume of the liquid is the same. The properties that solids and liquids share are that they both have definite volume.
* In general, the density of liquid state of a substance is less than that of solid state. * Liquids are slightly compressible. GASEOUS STATE * The gaseous state of matter has neither definite volume nor definite shape. It occupies the entire volume of the container in which it is filled and takes the shape of the container.