The sun emits its greatest intensity of radiation in:
a. the visible portion of the spectrum.
b. the infrared portion of the spectrum.
c. the ultraviolet portion of the spectrum.
d. the x-ray portion of the spectrum.
a
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How many enclaves are in the border region between India and Bangladesh?
A) less than 10 B) 25 C) 100 D) more than 250 E) none of the above
Which of the following parameters represents the angle measured from the horizon to the altitude of the observer in a 3-D view?
A. viewing distance B. viewing angle C. viewing azimuth D. none of these is correct
Broadly speaking, based on their chemical nature, how many different classes of chemical messengers are there?
A) 2 B) 3 C) 4 D) 5
What best explains why municipal governments are now focusing on waste reduction and recycling programs?
A. number of landfills has declined, which has increased the cost of waste disposal. B. citizens are more educated and now demand more green solutions. C. waste reduction and recycling programs are now profitable. D. groundwater contamination around landfills is getting worse. E. higher fuel prices are making it more expensive to transport waste.