Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 26, Problem 28Q
To determine
To explain: The occurrence of fusion since 15 minutes of the Big Bang for the first time in the stars of the first generations, when these are believed to be formed after 100 million years of the Big Bang.
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Assume the observable Universe is charge neutral, and that it contains n nuclei (hydrogen plus helium nuclei, ignoring other elements). Take the helium mass fraction as 1/4. How many electrons are there in the observable Universe? Enter your answer in scientific notation with one decimal place.
Values: n = 1*10^80
Assume the observable Universe is charge neutral, and that it contains n nuclei (hydrogen plus helium nuclei, ignoring other elements). Take the helium mass fraction as 1/4. How many electrons are there in the observable Universe? Enter your answer in scientific notation with one decimal place.
Value: n = 4*1080
Is the concept of Big Bang already a perfect scientific theory to explain the existence of theuniverse?
Chapter 26 Solutions
Universe
Ch. 26 - Prob. 1CCCh. 26 - Prob. 2CCCh. 26 - Prob. 3CCCh. 26 - Prob. 4CCCh. 26 - Prob. 5CCCh. 26 - Prob. 6CCCh. 26 - Prob. 7CCCh. 26 - Prob. 8CCCh. 26 - Prob. 9CCCh. 26 - Prob. 10CC
Ch. 26 - Prob. 11CCCh. 26 - Prob. 12CCCh. 26 - Prob. 1QCh. 26 - Prob. 2QCh. 26 - Prob. 3QCh. 26 - Prob. 4QCh. 26 - Prob. 6QCh. 26 - Prob. 7QCh. 26 - Prob. 8QCh. 26 - Prob. 9QCh. 26 - Prob. 10QCh. 26 - Prob. 11QCh. 26 - Prob. 12QCh. 26 - Prob. 13QCh. 26 - Prob. 14QCh. 26 - Prob. 15QCh. 26 - Prob. 16QCh. 26 - Prob. 17QCh. 26 - Prob. 18QCh. 26 - Prob. 19QCh. 26 - Prob. 20QCh. 26 - Prob. 21QCh. 26 - Prob. 22QCh. 26 - Prob. 23QCh. 26 - Prob. 24QCh. 26 - Prob. 25QCh. 26 - Prob. 26QCh. 26 - Prob. 27QCh. 26 - Prob. 28QCh. 26 - Prob. 29QCh. 26 - Prob. 30QCh. 26 - Prob. 31QCh. 26 - Prob. 32QCh. 26 - Prob. 33QCh. 26 - Prob. 34QCh. 26 - Prob. 35QCh. 26 - Prob. 36QCh. 26 - Prob. 37QCh. 26 - Prob. 38QCh. 26 - Prob. 39QCh. 26 - Prob. 40QCh. 26 - Prob. 41QCh. 26 - Prob. 42QCh. 26 - Prob. 43QCh. 26 - Prob. 44QCh. 26 - Prob. 45QCh. 26 - Prob. 46QCh. 26 - Prob. 47Q
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- Astronomers have found that there is more helium in the universe than stars could have made in the 13.8 billion years that the universe has been in existence. How does the Big Bang scenario solve this problem?arrow_forwardWhat is the difference between hot dark matter and cold dark matter? How does this difference affect cosmology?arrow_forwardIf all distant galaxies are expanding away from us, does this mean we’re at the center of the universe?arrow_forward
- Assume the observable Universe is charge neutral, and that it contains n nuclei (hydrogen plus helium nuclei, ignoring other elements). Take the helium mass fraction as 1/4. How many electrons are there in the observable Universe? Enter your answer in scientific notation with one decimal place.arrow_forwardComplete the following nuclear reactions and identify the cosmic phase (Big Bang Nucleosynthesis, Stellar Nucleosynthesis, or Stellar explosion) in which the reaction occured.arrow_forwardWhich particles are not present in the universe at t=300s after the big bang ? select one : a. Electons b. photons c. neutrons d. Positronsarrow_forward
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