(a) Use the observed ordinary mass density ofthe universe to determine the average

Chapter 16, Problem 21

(choose chapter or problem)

(a) Use the observed ordinary mass density ofthe universe to determine the average number ofnucleons per cubic meter throughout the universe.(b) There are 60 stars within 16.6 ly of the sun. If eachstar averages 1 solar mass, what is the mass density ofnucleons in the neighborhood of the sun?

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