Only about 5% of the energy in the universe is composedof
Chapter 44, Problem 44.36(choose chapter or problem)
Only about 5% of the energy in the universe is composedof baryonic matter, (a) Estimate the average density ofbaryonic matter in the observable universe with a radiusof 14 billion light-years that contains 1011 galaxies, each withabout 1011 stars like our Sun. (b) Estimate the density of darkmatter in the universe.
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