Chapter 11 22. Suppose an abnormally large amount of hydrogen suddenly burned in
ID: 233764 • Letter: C
Question
Chapter 11
22. Suppose an abnormally large amount of hydrogen suddenly burned in the core of the Sun. Which of the following would be observed first?
a. The Sun would become brighter.
b. The Sun would swell and become larger.
c. The Sun would become bluer.
d. The Sun would emit more neutrinos.
23. The solar corona has a temperature of more than a million kelvins; the photosphere has a temperature of only about 6000 K. Why isn’t the corona much, much brighter than the photosphere?
a. The magnetic field traps the light.
b. The corona emits only X-rays.
c. The photosphere is closer to us.
d. The corona has a much lower density.
24. The Sun rotates once every 25 days relative to the stars. The Sun rotates once every 27 days relative to Earth. Why are these two numbers different?
a. The stars are farther away.
b. Earth is smaller.
c. Earth moves in its orbit during this time.
d. The Sun moves relative to the stars.
25. Some engineers and physicists have been working to solve the world’s energy supply problem by constructing power plants that would convert hydrogen to helium. Our Sun seems to have solved this problem. On Earth, what is the major obstacle to this solution?
a. It is difficult to achieve the temperatures of the interior of the Sun.
b. There is not enough hydrogen.
c. The helium shortage is driving up prices.
d. All the hydrogen is locked up in water already.
Explanation / Answer
22. (d) The sun would emit more neutrinos.
23. (d) The corona has much lower density.
24. (c) Earth moves in its orbit during this time.
25. (a) It is difficult to achieve the temperatures of the interior of the sun.
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