Density
Weight of a volume of fluid
Fg = ρVg
Specific gravity
Pressure
Absolute pressure
P = P0 + ρgz
Gauge pressure
Pgauge = P – Patm = (P0 + ρgz) – Patm
Pascal’s principle
Buoyant force
Fbuoy = ρfluid V fluiddisplacedg = ρfluid V submergedg
Poiseuille’s law
Critical speed
Continuity equation
Q = v1A1 = v2A2
Bernoulli’s equation
Displacement in a hydraulic system
Work in a hydraulic system
Dynamic pressure component of Bernoulli's equation
Static pressure component of Bernoulli's equation
P + ρgh