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

Physics & Space Science

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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.

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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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science