r = m/V

Ratio of an object's mass to its volume

SG = r_object/r_water

Ratio of the density of the substance to the density of pure water

P = F/A

Ratio of the force acting perpendicular to a surface to the surface area (A)

P = r g h

Pressure as a function of depth (h)

F_B = m_fg = r_fgV_f

Buoyant force acting on an object placed in a fluid is equal to weight of the displaced fluid

rAv = constant

Mass of fluid moving past any point is constant

P = (1/2)rv² + rgh

Equation for the pressure at any point in a moving fluid

F_out/F_in = A_out/A_in

Pressure applied to enclosed fluid results in pressure at every point increasing by that amount