What happens to the helium-rich core of a star after the core runs out of hydrogen?
A) The core cools down and contracts.
B) The core expands and cools down.
C) The core heats up and expands.
D) The core contracts and heats up.
Correct Answer:
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Q220: In about 5 billion years the core
Q221: Degeneracy occurs when
A) electrons inside a star
Q222: Electron degeneracy, which is a result of
Q223: A degenerate-electron gas, which occurs in the
Q224: If electrons are collectively compressed into a
Q226: The temperature at which thermonuclear reactions begin
Q227: The Pauli exclusion principle states that two
Q228: Under what conditions does electron degeneracy occur?
A)
Q229: What is the Pauli exclusion principle?
A) Photons
Q230: What is the "safety valve" that prevents
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