What principle states that any change in pressure in an enclosed fluid is transmitted equally throughout the fluid?

Pascal's Principle, also known as Pascal's Law, states that when there is a change in pressure applied to an enclosed fluid, that change in pressure is transmitted undiminished throughout the entire fluid. This principle is essential in various applications, including hydraulic systems where a small force applied to a small area can create a much larger force over a larger area, allowing for mechanical advantages in lifting heavy objects.

In practical terms, this means that if you apply pressure to one part of a fluid in a closed container, every molecule in that fluid experiences the same increase in pressure, regardless of where it is located in the container. This uniform distribution of pressure is crucial in understanding how fluids behave under pressure and is fundamental in fields such as hydraulics and fluid dynamics.

Other options represent different principles: Archimedes' Principle is concerned with buoyancy, Bernoulli's Principle deals with fluid dynamics and the behavior of fluid flow, while Newton's Third Law pertains to action and reaction forces. Each of these concepts plays a significant role in physics, but they do not describe the behavior of pressure transmission in enclosed fluids as Pascal's Principle does.