The Outward Pressure in the Core of a Red Giant

question 50

Multiple Choice

The outward pressure in the core of a red giant balances the inward pull of gravity when

• A) the electrons and protons have combined to form neutrons.
• B) hydrogen begins fusing into helium.
• C) iron forms in the inner core.
• D) carbon fuses into heavier elements.
• E) the electron orbits are compressed so much they are all in contact.

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