The pressure difference that causes fluid to flow is known as the pressure gradient.

Specific gravity is the ratio of the density of a substance to the density of a reference substance, typically water.

According to Archimedes' principle, the buoyant force on a submerged object is equal to the weight of the fluid displaced by the object.

An ideal fluid is defined as being incompressible and non-viscous, meaning it has no internal friction.

Viscosity is the measure of a fluid's resistance to flow. Higher viscosity means the fluid flows less easily.

Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature.

Bernoulli's principle is represented by the equation P + 1/2 ρv² + ρgh = constant, relating pressure, velocity, and height in a fluid.

Surface tension is a property of liquids that causes them to minimize their surface area, allowing them to form droplets.

Laminar flow is characterized by smooth and orderly fluid motion, typically occurring at low velocities.

Pascal's Principle states that pressure applied to a confined fluid is transmitted undiminished in all directions.

Bernoulli's Principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure.

Viscosity is the property of fluids that describes their resistance to flow.