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Pressure in a Fluid Matter occurs in three phases: solid, liquid, and gas. A solid has a definite shape and volume. Liquids and gases are fluids. When a fluid is placed in a container, it assumes the shape of the container. A gas is distinguished from a fluid in that it fills the entire container, whereas the liquid forms a definite interface (as when water half fills a bottle, leaving an air−water interface). Pressure plays an important role in the behavior of fluids. When a force of magnitude F acts normal to …
Michael Browne: Schaum's Outline of Physics for Engineering and Science, Third Edition. Fluids, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export