Why were orders for new nuclear plants cancelled in the U.S. approximately 20 years ago? What will be an ideal response?
Nuclear accidents at Three-Mile Island in the U.S. and Chernobyl in the former Soviet Union raised
fears among Americans about the safety of nuclear plants
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Photovoltaic systems are characterized by all of the following except
A. they convert sunlight into electricity. B. they have become more efficient over the past 25 years. C. they are difficult to use where conventional electricity is unavailable. D. they are economically competitive with fossil fuels in many places.
The pH scale is a quantitative representation of the relative amounts of ________
A) water and carbon dioxide molecules in solution B) hydrogen and polar water molecules in solution C) alkaline and basic ions in solution D) hydrogen and oxygen ions in solution E) hydrogen and hydroxyl ions in solution
All of the following resources are present in biotechnology centers in the U.S., EXCEPT
A) low-wage labor. B) excellent universities with medical schools. C) state-of-the-art fiber optics. D) diverse social environments. E) desirable recreational environments.
The condensation process requires
A) moisture droplets. B) condensation nuclei and saturated air. C) condensation nuclei alone. D) dew-point temperatures alone. E) latent heat of sublimation.