The critical mass density needed to just halt the expansion of the universe is approximately 10 -26
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The critical mass density needed to just halt the expansion of the universe is approximately 10-26 kg/m3.
(a) Convert this to eV/c2 · m3.
(b) Find the number of neutrinos per cubic meter needed to close the universe if their average mass is 7 eV/c2 and they have negligible kinetic energies.
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Part a Converting Critical Density to eVc2 m3 We want to convert 1026 kgm3 to eVc2 m3 To convert kg ...View the full answer
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