What term describes the balance between inward gravitational force and outward fusion pressure in a star?
Answer
Hydrostatic equilibrium
A star is defined by a constant tug-of-war between two opposing forces: the inward, crushing pressure exerted by gravity due to the star's immense mass, and the outward pressure generated by the energy released during nuclear fusion. When these two forces reach a state of balance, the star is in hydrostatic equilibrium. This self-regulating mechanism ensures the star remains stable for billions of years. If the fusion rate drops, the star contracts, which increases pressure and temperature, thereby restarting the fusion rate and stabilizing the star, preventing it from collapsing or exploding.
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