A maglev is/does all of the following EXCEPT
A) a magnetically elevated train.
B) cruises on a cushion of air at high speeds on a detached right-of-way.
C) state of the future in ground transportation systems.
D) produces little or no air pollution.
E) four times as efficient as automobiles.
E
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Which emits radiation of the highest frequency?
A. The Sun. B. A blue-hot star. C. A red-hot star. D. all the same
The bending of light or sound waves is referred to as ____
A) reflection B) refraction C) absorption D) transmission
The most direct and fundamental relationship between overgrazing and soil erosion is that
A. overgrazing causes eutrophication. B. overgrazing leads to the loss of vegetation. C. overgrazing leads to soil compaction. D. overgrazing increases that amount of suspended particles in the air.
Evidence of liquefaction includes
A. surface waves. B. tsunamis. C. fault scarps. D. sand boils.