Cosmic background radiation refers to
A) uniformly distributed residual radiation that resulted from the Big Bang.
B) pockets of radiation found in certain quadrants of the observable universe.
C) the radiation emitted from galactic nuclei.
D) redshifted microwave radiation being emitted from the center of the universe.
Answer: A
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If two objects are the same size, but one object has a temperature 3 times as hot (in Kelvin) as the other object, the hotter object emits
A) 3 times as much energy. B) 9 times as much energy. C) 12 times as much energy. D) 81 times as much energy. E) 27 times as much energy.
Which quantity can be converted from the English system to the metric system by the conversion factor 
?
A. feet per second B. feet per hour C. miles per second D. miles per hour E. miles per minute
A meter stick having a rest mass of 1 kg moves past you. Your measurements show it to have a mass of 2 kg and a length of 1 m. How is the stick oriented, as observed by you?
A) perpendicular to its direction of motion B) parallel to its direction of motion C) It is impossible to say anything about the orientation without further information. D) Nonsense--if the stick's mass has increased to 2 kg, then it must be longer than 1 m.
Lenses can be used to focus sunlight to a small point to burn paper or dry brush. A person demonstrates this using their own eyeglasses as the lenses. From this you can tell that
A. the person is either near- or farsighted but not both. B. the person is farsighted. C. the person is both near- and farsighted. D. the person is nearsighted.