Concept explainers
(a)
Time at which the universe cooled below the threshold temperature for producing kaons.
(a)
Answer to Problem 33GP
Time at which the universe cooled below the threshold temperature for producing kaons is
Explanation of Solution
Given: Mass of kaons is
Formula used:
Kinetic energy is calculated as
Calculation:
The temperature that corresponds to kinetic energy is
As shown in the figure below, time that corresponds to the temperature on the cosmological calendar
Figure 1
Time which corresponds to temperature
Conclusion:
Time at which the Universe cooled below the threshold temperature for producing kaons is
(b)
Time at which the Universe cooled below the threshold temperature for producing Y particle.
(b)
Answer to Problem 33GP
Time at which the Universe cooled below the threshold temperature for producing Y particle is
Explanation of Solution
Given:
Mass of Y is
Formula used:
Kinetic energy is calculated as
Calculation:
The temperature that corresponds to kinetic energy is
From figure 1, time which corresponds to this temperature on the cosmological calendar is
Conclusion:
Time at which the Universe cooled below the threshold temperature for producing Y particle is
(c)
Time at which the Universe cooled below the threshold temperature for producing muons.
(c)
Answer to Problem 33GP
Time at which the Universe cooled below the threshold temperature for producing muons is
Explanation of Solution
Given:
Mass of muons is
Formula used:
Kinetic energy is calculated as
Calculation:
The temperature that corresponds to kinetic energy is
From figure 1, time which corresponds to this temperature on the cosmological calendar is
Conclusion:
Time at which the Universe cooled below the threshold temperature for producing muons is
Chapter 33 Solutions
Physics: Principles with Applications
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