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  • Which of the following types of stars do not produce energy by nuclear . . .
    White dwarfs and neutron stars do not produce energy through nuclear fusion White dwarfs represent remnants of stars that have ceased fusion, while neutron stars are extremely dense remnants formed after supernova explosions
  • Nuclear fusion - Stars, Reactions, Energy | Britannica
    The situation in star formation differs in one respect: gravity is the cause of the collapse, and a collapsed star begins to expand again due to heat from exoergic nuclear fusion reactions
  • Nuclear fusion - Wikipedia
    Fusion processes require an extremely large triple product of temperature, density, and confinement time These conditions occur only in stellar cores, advanced nuclear weapons, and are approached in fusion power experiments
  • Nuclear Reactions in Stars - HyperPhysics
    While the iron group is the upper limit in terms of energy yield by fusion, heavier elements are created in the stars by another class of nuclear reactions This nuclear synthesis of elements heavier than iron uses energy rather than supplies it
  • CH 14: Stars Flashcards | Quizlet
    The Sun and other stars use nuclear fusion reactions to convert mass into energy Eventually, when a star's nuclear fuel is depleted, the star must burn out
  • Fusion in Stars - Nuclear fusion - Energy Encyclopedia
    As a star grows older and older and its density and core temperature increases, fusion continues and produces heavier and heavier elements up to nickel As fusion of nickel or heavier elements does not produce energy, the star that reached that point of fusion exhausted its sources of fuel
  • The Astrophysics Spectator: Nuclear Fusion in Stars
    The fusion of elements heavier than iron takes energy rather than gives energy Stars are therefore powered by the fusion of elements lighter than iron, particularly of hydrogen
  • Nuclear fusion explained - Institute of Physics
    The processes by which stars, such as the Sun, produce energy is well-known to be based on nuclear fusion, and there has been a long-held ambition to reproduce this on Earth
  • Stars - NASA Science
    More massive stars must burn fuel at a higher rate to generate the energy that keeps them from collapsing under their own weight Some low-mass stars will shine for trillions of years – longer than the universe has currently existed – while some massive stars will live for only a few million years
  • Stellar nucleosynthesis - Wikipedia
    Main sequence stars accumulate helium in their cores as a result of hydrogen fusion, but the core does not become hot enough to initiate helium fusion Helium fusion first begins when a star leaves the red giant branch after accumulating sufficient helium in its core to ignite it





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