PV technology is best described as ________
A) using sun's energy to warm a room without mechanical devices
B) trapping sun's heat and storing it for various uses
C) a passive solar technology
D) using mirrors to concentrate sunlight, in order to heat water and produce steam for electricity generation
E) using sunlight to generate electricity
Answer: E
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The crisis in controlling bedbugs has encountered difficulties because
A) bedbugs are vectors for serious human diseases and require powerful chemical pesticides. B) home applications of effective pesticides can endanger children. C) the only way to get any control is to burn infested bedding. D) bedbugs are internal parasites that require long doses of antibiotics to eliminate.
The difference between subsidence and hydrocompaction is that, in subsidence,:
a. only silt and sand-size materials are susceptible b. the collapse occurs during wetting c. the soil collapses into a subsurface void or densifies due to removal of fluid d. the soil expands and contracts seasonally
Which region is the least populous, with only about 1% of the world's population?
A) Asia B) Europe C) North America D) Latin America E) Oceania
When do the Sun's rays hit the Northern Hemisphere mid-latitudes at the highest angle?
A) Spring equinox B) Summer solstice C) Winter solstice D) Fall equinox