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.

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.

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.