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Today, 09:17

Stellar equilibrium is a balance between what two things? A. Outward and inward gravity. B. Outward pressure from light and inward pressure from heat. C. Outward pressure from hydrogen and inward helium. D. Outward pressure and inward gravity

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  1. Today, 12:07
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    Answer: D. Outward pressure and inward gravity

    Explanation:

    In the core of a star, hydrogen atoms fuse to form Helium atoms. This nuclear fusion reaction generates immense amount of heat and pressure. The pressure pushes the atmosphere of the star outwards. This pressure is balanced by the gravity of the mass pulling itself inside. Thus, an equilibrium is maintained. If a dis-balance is created, the star expands when there is excess pressure or collapses under its own weight.
  2. Today, 13:15
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    D) Outward pressure and inward gravity
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