Wednesday, February 29, 2012

How does inward force of gravity overcome outward force of radiation pressure during the end of a star's life?

Choose only ONE:



a. As the star gets bigger, the force of gravity also gets bigger, while the radiation pressure stays the same.

b. The star fuses more hydrogen as it gets near the end of its life, then the fusion of hydrogen is converted to gravity.

c. Near the end of its life, a star runs out of hydrogen to fuse, and fusion is what creates the radiation pressure.

d. Gravity increases with time, so the older a star gets, the more it is affected by the force of gravity.How does inward force of gravity overcome outward force of radiation pressure during the end of a star's life?
when there is nothing to burn gravity overcomes the power of nuclear fusion because there is no nuclear fusionHow does inward force of gravity overcome outward force of radiation pressure during the end of a star's life?
The amount of gravitation force an object exerts on other objects depends on two things only: the objects mass and how far the object is from the second object. The density of the object has no effect on the amount of gravitational force it has. For example, Saturn has the similiar denisty as cork,

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How does inward force of gravity overcome outward force of radiation pressure during the end of a star's life?
abcd and are all correct except with C needing hydrogen to fuse. Many elements fuse all the way up to iron.(hence the color of the star) And A radiation pressure fluctuates as a star cycles though elements to fuse due to the changing force of gravity.



Gravity does change as the star shrinks because the cores matter becomes more dense. And radiation pressure dramtically rises when a star becomes a red giant.

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