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Pretend that galaxies are spaced evenly, 2.0 Mpc apart, and the average mass of a galaxy is 1.0 x 1011 Mo: What is the average density (in kg/m3)
of matter in the universe? (ote: The volume of a sphere is
, and the mass of the sun is 2.0 x 1030 kg.)
kg/m3

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