Figure 9-22b of Comins,Discovering the Essential Universe,6th Ed

question 120

Multiple Choice

Figure 9-22b of Comins,Discovering the Essential Universe,6th ed.,shows that all of the Sun's luminosity is generated within the inner 25% of the solar radius.What can you say about the correlation of the other graphs in the figure with the luminosity graph?

• A) Almost all of the Sun's mass is located within the inner 25% of the solar radius.
• B) The core has a temperature of 15.5 × 10⁶ K, the temperature needed for hydrogen fusion, throughout this inner 25% of the solar radius.
• C) The temperature actually peaks in the convection zone, driving the convection process.
• D) The density is greatest within the inner 25% of the solar radius, causing the high pressure and temperature required for hydrogen fusion.

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