What is the power factor of an RLC series circuit with an inductive reactance of 174 ?, a capacitive reactance of 60 ? and a resistance of 100 ??
A) 0.29
B) 0.46
C) 0.56
D) 0.66
E) 0.76
D
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Which of these Galilean satellites is most geologically active?
a. Io b. Europa c. Callisto d. Ganymede
Large curved cooling towers can often be seen at
A) steam-electric power plants. B) nuclear power plants. C) Both of the above. D) hydro-electric plants. E) All of the above.
What do we mean by the term inflation?
A) a sudden and extremely rapid expansion of the universe that occurred in a tiny fraction of a second during the universe's first second of existence B) the expansion of the universe that we still observe today C) the sudden release of photons when a particle and antiparticle annihilate one another D) quantum fluctuations by high speed, relativistic particles in a state of false vacuum that caused disturbances in the space—time continuum leading to the process described in the question to which this answer refers
A common opinion concerning the creationism versus evolution controversy is the idea that Earth was created fairly recently but that it was created with fossils and other evidence of great age already present, so that Earth has the appearance of
being very old even though it is really quite young. This opinion is best classified as A) a scientific hypothesis for which there is currently insufficient evidence. B) a scientific opinion that is probably incorrect. C) nonscientific because it contradicts common sense. D) nonscientific because there is no conceivable scientific way to disprove it. E) a scientific opinion that is certainly incorrect.