Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 26, Problem 47Q
To determine
The living conditions when the protons were decaying in large numbers.
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Chapter 26 Solutions
Universe: Stars And Galaxies
Ch. 26 - Prob. 1QCh. 26 - Prob. 2QCh. 26 - Prob. 3QCh. 26 - Prob. 4QCh. 26 - Prob. 5QCh. 26 - Prob. 6QCh. 26 - Prob. 7QCh. 26 - Prob. 8QCh. 26 - Prob. 9QCh. 26 - Prob. 10Q
Ch. 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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- Suppose a spaceship has the mass of a typical ocean cruise ship, then it can be assumed that it has a mass of 3.1 × 108 kg. Consider the kinetic energy required at 13 % of the speed of light. If energy to get a spaceship to cruising speed is generated using matter-antimatter annihilation, what mass of antimatter in kg is required?Hint: Matter-antimatter annihilation converts an entire mass of matter and antimatter into pure energy with no loss.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_forwardSuppose that not all but only 50% of the neutrons were consumed in Big Bang Nucleosynthesis. What would the H:He mass ratio be? 13:2 26:1 6:1 3:2 Is the answer A? I tried keeping the 7:1 number ratio of H:He and calculate as follows: Suppose there are 28 H and 4 neutrons, so 2 He is made by combining 4 H with 4 neutrons. So, 2 He is made and 24 H is left. H:He mass ratio is 3:1. If 4 neutrons is reduced to 2 neutrons while there are still 28 H, only 1 He is made by combining 2 H with 2 neutrons. 26 H is left. So, the new H:He mass ratio is 13:2 (26/4) Is this a working method? Thank you very much!arrow_forward
- Suppose a spaceship has the mass of a typical ocean cruise ship, then it can be assumed that it has a mass of 2.1 × 108 kg. Consider the kinetic energy required at 13 % of the speed of light. If energy to get a spaceship to cruising speed is generated using matter-antimatter annihilation, what mass of antimatter in kg is required? Hint: Matter-antimatter annihilation converts an entire mass of matter and antimatter into pure energy with no loss.arrow_forwardQ6:A-find the charge of up(u) .down (d) and neutron by using Gell-Mann formula b-Based on quark composition of a proton, show that its charge is +1.arrow_forwardAccording to the article Alien Antimatter Crashes into Earth e: More than 60 years ago, future Nobel laureate Sheldon Glashow predicted that if an antineutrino – the antimatter answer to the nearly massless neutrino – collided with electron, it could produce a cascade of other particles. The "Glashow resonance phenomenon is hard to detect, in large part because the antineutrino needs about 1,0 times more energy than what's produced in the most powerful colliders on Earth. Let's compare this event to an ordinary baseball with a mass of 146 g. Please use three significant figures in your calculations.arrow_forward
- How can we apply the knowledge that was produced by the lhc to our current society?arrow_forwardIn the early universe, the formation of л* or лº was through thermal interactions. What is the difference in mean temperatures for their thresholds of formation?arrow_forward40K decays to 40Ar with a half-life of 1.3 billion years. Argon is a gas, so 40Ar escapes into the atmosphere once it forms. Suppose a sample of granite originally contained 20 g of 40K, but it now contains only 5 g. How many half-lives have passed? How old is the rock?arrow_forward
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