Estimate what neutrino mass (in eV/c2) would provide
Chapter 44, Problem 44.44(choose chapter or problem)
Estimate what neutrino mass (in eV/c2) would provide thecritical density to close the universe. Assume the neutrinodensity is, like photons, about 109 times that of nucleons, andthat nucleons make up only (a) 2% of the mass needed, or(b) 5% of the mass needed.
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