What are some Equilibrium examples for science?

Equilibrium in science can be observed in various contexts. In chemistry, a common example is the dynamic equilibrium in a reversible reaction, where the rate of the forward reaction equals the rate of the reverse reaction, such as in the synthesis of ammonia (Haber process). In physics, mechanical equilibrium occurs when an object is at rest or moving at a constant velocity, with the net force acting on it being zero. Additionally, in ecology, population equilibrium refers to a stable state where species populations remain relatively constant over time, balancing birth and death rates.