Compounds:
a. always have the same major characteristics as their component elements.
b. never have the same major characteristics as any of their component elements.
c. often consist of a single element.
d. are often surprisingly different from their component elements.
e. have characteristics that can be easily predicted if you know the component elements.
d
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The speed of FM waves will be observed to be c = 2.9979 × 108 m/s when the antenna emitting the waves is
A. at rest relative to the receiving antenna. B. moving to the right of the detecting antenna at 0.5c. C. moving to the left of the detecting antenna at 0.5c. D. moving as described in (a), (b) or (c) above. E. moving at 2.9979 × 108 m/s.
If high tide is at noon, the next high tide will be at
A. 6 am B. noon tomorrow. C. midnight. D. 6 pm
The change in fossils at the K-T sediment layer suggests that in addition to the dinosaurs, _________ also went extinct.
Fill in the blank(s) with the appropriate word(s).
When Copernicus first created his Sun-centered model of the universe, it did not lead to substantially better predictions of planetary positions than the Ptolemaic model. Why not?
A) Copernicus used perfect circles for the orbits of the planets, though they are actually ellipses. B) Copernicus placed the planets in the wrong order going outward from the Sun. C) Copernicus misjudged the distances between the planets. D) Copernicus placed the Sun at the center, but did not realize that the Moon orbits Earth.