The point in time when the expansion of the universe began is referred to the
A) big crunch
B) cosmic detonation event
C) big bang
D) big blowup
C
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How does an antiquark differ from a quark?
A) It has a different flavor. B) It has opposite mass. C) It has a much greater mass. D) It has opposite charge. E) It is much more common in nature.
For 1 gram of radioactive material that has a half-life of one year, after 4 years the original radioactive material left will be
A) 0 g. B) 1/2 g. C) 1/4 g. D) 1/8 g. E) none of the above
Which system is the primary system of units
used in the United States today? a)The System International b)The British system c)The metric system d)The mks system
The majority of the radiation emitted to the general public in the normal operation of a nuclear plant comes from the ________
a. cooling water discharged to a lake or a river. b. reactor core directly. c. spent fuel rods stored on site. d. fission fragment gases vented to the atmosphere. e. low level wastes shipped from the plant