Corn-produced ethanol ________
A) does not require inputs of fossil fuel energy
B) does not produce greenhouse gases when burned
C) results in higher food prices for corn and corn products
D) yields more than 10x the energy required to produce it
E) cannot be mixed with other fuels
C
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An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu. If the average atomic mass of all the isotopes is 66.5 amu, what can be said about the relative abundance of the isotopes?
A) The isotope with the mass of 67 is more abundant than the isotope with the mass of 65. B) The isotope with the mass of 65 is more abundant than the isotope with the mass of 67. C) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 67. D) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 65. E) All the isotopes have the same relative abundance.
The largest earthquakes occur in ____
a. ?divergent zones b. ?rift zones c. ?sand boils d. ?subduction zones e. ?intraplate zones
Subsidence in the Gulf coast is mainly due to ____
A) ?tectonic activity B) ?emptying of a volcanic chamber C) ?coastal erosion D) ?sediment compaction
Compare post-World War II development policies in South Korea, Taiwan, and Japan
What will be an ideal response?