Currently, in the United States, which fuel has the largest consumption?
a. Oil
b. Natural gas
c. Coal
d. Nuclear
a
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If different filters are used with an astronomical telescope, which of the following would give the best resolution?
a. red b. yellow c. green d. purple e. All yield the same resolution.
The frequency in an AC series circuit is halved. By what factor does this change the capacitive reactance?
a. 1/2 c. 1/4 b. 4 d. 2
You observe the same spectral line in two stars that are identical in every way except that one rotates faster than the other. How does the spectral line differ between the two?
A) There is no difference. B) The line in the faster rotating star is blueshifted. C) The line in the faster rotating star is redshifted. D) The line in the faster rotating star is broader. E) The line in the faster rotating star is narrower.
We can study how galaxies evolve because
A) we can watch as they interact in real time. B) the farther away we look, the further back in time we see. C) galaxies are transparent to visible light. D) we are really smart astronomers.