Question

which of the following is a star that has used up its hydrogen supply in the core and switched into the thermonuclear fusion of the hydrogen?

A. Supernova B. protostar
C. black hole D. red giant​

Answer 1

Answer:

A red giant is a star that has used up its hydrogen supply in the core and switched into the thermonuclear fusion of hydrogen in the shell surrounding the core.

Answer 2

Option D) red giant​

Red giant​ is a star that has used up its hydrogen supply in the core and switched into the thermonuclear fusion of the hydrogen.

• Supergiants in red. Red supergiant stars have run out of hydrogen at their cores, which causes their outer layers to expand significantly when they go off the main sequence.
• Helium is being created from hydrogen in the Sun's core. Nuclear fusion is the term for this. Each helium atom is created by the fusion of four hydrogen atoms. A portion of the mass is changed into energy during the process.
• A low mass star shines brighter when its core first runs out of hydrogen because: The core contracts, raising the temperature and causing the hydrogen to burn more intensely outside. A star can only undergo one red giant transformation. Ahead of and following the helium flash, yes.
• a red massive star a massive star with a low surface temperature and high luminosity. When there is no hydrogen left in the core to support nuclear fusion, red giants are assumed to be in a late stage of evolution. Supergiant red star.

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