The Emergency Core Cooling System is used in the event of an accident to ________
a. stop the fission reactions
b. reduce fuel rod temperatures
c. provide backup power to control rods
d. change the decay heat of the fuel pellets
b
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In the context of the magnitude scale, the larger the magnitude number of a star, _____
A) the older the star is B) the fainter the star is C) the closer the star is D) the brighter the star is
Why does Jupiter have three distinct layers of clouds?
A) The three layers represent clouds made of gases that condense at different temperatures. B) Jupiter has three different types of wind, each of which makes a different type of cloud. C) The three layers reflect regions of Jupiter's atmosphere with different chemical compositions. D) Clouds form randomly, so on average there are always three layers.
When waves from a pair of closely-spaced slits arrive in phase
A) a bright fringe is produced. B) a dark fringe is produced. C) both bright and dark fringes are produced. D) none of the above
Which of the following is not a unit of radiation dose?
a. rem b. roentgen c. rad d. RBE