On a cold day, a piece of metal feels much colder to the touch than a piece of wood. This is due to the difference in which one of the following physical properties of these materials?
A) density
B) specific heat
C) emissivity
D) thermal conductivity
E) mass
D
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What is the name of constellations that appear to never rise or set?
a. polar constellations b. circumference constellations c. circular constellations d. celestial polar constellations e. circumpolar constellations
Which of the following is most likely to encourage nuclear weapons proliferation?
A) mining of uranium B) mass production of frozen pizza. C) recycling of plutonium D) fabrication [i.e., production] of reactor fuels pellets and fuel rods E) storage of used nuclear fuel rods
All people come very close to being able to float in water. What therefore is the volume (in cubic meters) of a 50-kg woman?
a. 0.007 b. 0.035 c. 0.050 d. 0.070 e. 0.085
Which of these things is NOT a model in the sense used in the textbook?
a. Someone who is employed to appear in advertisements of merchandise. b. A guess about the contents of a box based on the weight of the box and the sounds it makes when shaken. c. A mathematical equation describing an observation of an unknown process. d. An analogy to a known process or object. e. A theory of what your cousin might have put in a box she sent you for your birthday.