
Concept explainers
(a)
The percentage of hydrogen in the core originally.
(a)

Answer to Problem 39QAP
The percentage of hydrogen was
Explanation of Solution
Sun is middle-aged, main sequence star of G2 spectral type. The surface temperature of the Sun is 5800 K. It continuously produces energy with the help of nuclear fusion occurring in its core that is transferred from its core to outer surface.
The sun had even mass composition of helium and hydrogen throughout its core and surface when it was formed. Helium was
Conclusion:
Thus, the percentage of hydrogen was
(b)
The percentage of hydrogen in the core today.
(b)

Answer to Problem 39QAP
The percentage of hydrogen is
Explanation of Solution
Sun is middle-aged, main sequence star of G2 spectral type. The surface temperature of the Sun is 5800 K. It continuously produces energy with the help of nuclear fusion occurring in its core that is transferred from its core to outer surface.
The sun had even mass composition of helium and hydrogen throughout its core and surface when it was formed. Helium was
However, continuous fusion of hydrogen atoms into helium decreases the amount of hydrogen in the core. Today, only
Conclusion:
Thus, the percentage of hydrogen is
(c)
The percentage of hydrogen in the core originally.
(c)

Answer to Problem 39QAP
The percentage of hydrogen will zero percent of total mass in the core after
Explanation of Solution
Sun is middle-aged, main sequence star of G2 spectral type. The surface temperature of the Sun is 5800 K. It continuously produces energy with the help of nuclear fusion occurring in its core that is transferred from its core to outer surface.
The sun had even mass composition of helium and hydrogen throughout its core and surface when it was formed. Helium was
However, continuous fusion of hydrogen atoms into helium decreases the amount of hydrogen in the core. Today, only
The lifetime of Sun is
Conclusion:
Thus, the percentage of hydrogen will zero percent of total mass in the core after
(d)
The percentage of hydrogen in the entire Sun originally.
(d)

Answer to Problem 39QAP
The percentage of hydrogen was
Explanation of Solution
Sun is middle-aged, main sequence star of G2 spectral type. The surface temperature of the Sun is 5800 K. It continuously produces energy with the help of nuclear fusion occurring in its core that is transferred from its core to outer surface.
The sun had even mass composition of helium and hydrogen throughout its core and surface when it was formed. Helium was
Conclusion:
Thus, the percentage of hydrogen was
(e)
The percentage of hydrogen in the core today.
(e)

Answer to Problem 39QAP
The percentage of hydrogen is
Explanation of Solution
Sun is middle-aged, main sequence star of G2 spectral type. The surface temperature of the Sun is 5800 K. It continuously produces energy with the help of nuclear fusion occurring in its core that is transferred from its core to outer surface.
The sun had even mass composition of helium and hydrogen throughout its core and surface when it was formed. Helium was
However, continuous fusion of hydrogen atoms into helium decreases the amount of hydrogen in the core. Today, only
The core of the Sun extends up to
From figure, it is observed that
Conclusion:
Thus, the percentage of hydrogen is
(f)
The percentage of hydrogen in the core originally.
(f)

Answer to Problem 39QAP
The percentage of hydrogen is
Explanation of Solution
Sun is middle-aged, main sequence star of G2 spectral type. The surface temperature of the Sun is 5800 K. It continuously produces energy with the help of nuclear fusion occurring in its core that is transferred from its core to outer surface.
The sun had even mass composition of helium and hydrogen throughout its core and surface when it was formed. Helium was
However, continuous fusion of hydrogen atoms into helium decreases the amount of hydrogen in the core. Today, only
The lifetime of Sun is
The core of the Sun extends up to
From figure, it is observed that
Conclusion:
Thus, the percentage of hydrogen is
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Chapter 12 Solutions
Understanding Our Universe
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