Which law states that for every action, there is an equal and opposite reaction?

The law that states "for every action, there is an equal and opposite reaction" is known as Newton's third law. This principle highlights the relationship between forces when two objects interact. For instance, if object A exerts a force on object B, then object B simultaneously exerts a force of equal magnitude but in the opposite direction back on object A. This principle is critical in understanding how forces work in a variety of mechanical systems, including gas turbines, where the exhaust gases expelled from the turbine create thrust that propels the aircraft forward.

Newton's first law pertains to inertia and the tendency of an object to remain at rest or in uniform motion unless acted upon by an external force. Meanwhile, Newton's second law establishes the relationship between force, mass, and acceleration, encapsulated in the equation F=ma. Bernoulli's principle, on the other hand, relates to fluid dynamics, specifically the conservation of energy in flowing fluids. Each of these laws and principles is essential in their own areas of mechanics and physics, but they do not convey the action-reaction relationship defined in Newton's third law.