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Home Q & A Board Science-Related Homework Help Physics
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12 years ago
For a given value of Hubble's constant, how does the age of the universe depend on the overall density of the universe?
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12 years ago
The higher the density, the younger is the universe. This is because Hubble's constant measures the expansion rate at present. If the density is high, then the expansion has slowed substantially with time and must have been much faster in the past. Faster expansion in the past means it took less time for the universe to reach its current size, so the universe would be younger.
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