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9 December, 22:32

Which best describes stellar equilibrium?

O

A. The star produces fuel at the same rate it burns fuel.

O

B. The core contains equal amounts of hydrogen and helium.

O

c. Pressure caused by fusion reactions in the core is balanced by the

gravity exerted by the sun's mass.

O

D. Heat produced during fusion reactions in the core is transferred to

the surface.

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Answers (2)
  1. 9 December, 23:56
    0
    the answer is B. The core contains equal amounts of hydrogen and helium.

    Stellar equilibrium is also known by its other term hydrostatic equilibrium. A star is considered to be in equilibrium when the pressures located in the star balance out the force of gravity ... A star will remain in equilibrium until such time when the supply of hydrogen in the core is exhausted.
  2. 10 December, 02:26
    0
    The correct answer is letter B.

    Explanation: Even for the best studied star we can only measure 4 parameters: mass, luminosity, radius and chemical composition of the outer layers. We can determine the structure of the star with these parameters, because we have one more condition: the constancy of the stars over long periods of time. Even variable stars have long-term stability of the average structure. The existence of fossil algae on the earth over 1 billion years old and fossils up to 3.5 billion years old is evidence that the temperature of the earth cannot have changed by more than about 20 ° C. Therefore, the interior of the stars must be in perfect balance.
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