Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
33
Astrophysics and Cosmology
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33-1 to 33-3: Stars, Galaxies, Stellar Evolution, Distances
33-4: General Relativity, Gravity and Curved Space
33-5: Redshift, Hubble's Law
33-6 to 33-8: The Big Bang, CMB, Universe Expansion
33-9: Dark Matter, Dark Energy

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 37
Q

At approximately what time had the universe cooled below the threshold temperature for producing

  1. kaons (M \approx 500 MeV/c2\textrm{MeV/c}^2),
  2. Υ\Upsilon (M \approx 9500 MeV/c2\textrm{MeV/c}^2), and
  3. muons (M \approx 100 MeV/c2\textrm{MeV/c}^2)?
A
  1. 106 s10^{-6} \textrm{ s}
  2. 108 s10^{-8} \textrm{ s}
  3. 105 s10^{-5} \textrm{ s}
Giancoli 7th Edition, Chapter 33, Problem 37 solution video poster
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