For which of the following reasons is production of ethanol unwise?
a. Pollutants aren't significantly reduced.
b. It takes twice as much fossil-fuel energy to produce ethanol than the ethanol that is produced supplies.
c. It can drive costs of corn higher.
d. All of the above.
d
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Essentially, the Great Red Spot is
A) traveling north and south across Jupiter's face. B) composed primarily of iron oxide. C) a large cyclonic storm (hurricane). D) always located within 10 degrees of Jupiter's north pole. E) Neptune's largest atmospheric feature.
The farthest galaxies from the Milky Way appear to be receding from us at the rate of 76,000 miles/sec. An observer in one of these distant galaxies would consider our galaxy to be
A. moving away at 76,000 miles/sec. B. standing still but not at the center of the universe. C. moving at 76,000 miles/sec and located at the center of the universe. D. one of the few moving galaxies in the universe. E. standing still at the center of the universe.
In ratio form, the equivalence statement 1 mi = 1.61 km would be expressed as ______________
Fill in the blank(s) with correct word
Celestial latitude is called
a. declination. b. right ascension. c. the parsec value. d. the zenith angle.