A degenerate-electron gas, which occurs in the core of a red giant star, lacks the "safety valve" of a normal gas because a rise in

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In a degenerate-electron gas, typical of the core of a red giant star, the pressure is largely independent of temperature due to the principles of quantum mechanics. This means that when the temperature increases, the pressure does not change significantly, preventing the gas from expanding and cooling in the way a normal gas would. This characteristic is crucial in understanding the behavior of such stars and their evolution.

A Degenerate-Electron Gas, Which Occurs in the Core of a Red