1. If a star the size of the sun expands to form a giant 20 times larger in radius, by what… 1 answer below »

1. If a star the size of the sun expands to form a giant 20 times larger in radius, by what factor will its average density decrease? (Hint: The volume of a sphere is 4 3πr3 .) 2. If a star the size of the sun collapses to form a white dwarf the size of Earth, by what factor will its density increase? (Hints: The volume of a sphere is 4 3πr3 . See Appendix A for the radii of the sun and Earth.)  

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