Which of the following statements about the stages of nuclear burning in a massive star is not true?
A) Each successive stage creates an element with a higher atomic weight.
B) As each stage ends, the core shrinks further.
C) Each successive stage of fusion requires higher temperatures than the previous stages.
D) Each successive stage lasts for approximately as long as the first, hydrogen fusion stage.
Question 2
The cosmic microwave background peaks at a wavelength of about 1 mm, and the universe has a temperature of about 3 K.
If the microwave background peaked at a wavelength of 10 micrometers, what would its temperature be? (Hint: see Cosmic Calculations 5.1 and 17.1)
A) about 0.3 K B) about 300 K C) about 30 K D) about 0.03 K
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