Fluids are comprised of a mixture of two [[States|states]] of matter: [[Gas|gases]] and [[Liquid|liquids]]. There are three important properties that define the state of a fluid. Knowing two of these properties should allow you to figure out the third. These properties are: - [[Specific Volume and Density]] - [[Pressure]] - [[Temperature]] Some other important properties of fluids are: - [[Specific Gravity]]: $SG$ is the ratio of density of a fluid to the standard density of water - [[Dynamic Viscosity]]: $\mu$ measures how easily a fluid will deform and flow. Higher viscosity fluids are more resistant to flow. - [[Kinematic Viscosity]]: $\nu$ is the ratio of dynamic viscosity to density.