Solar-powered distillation of water
A. does not require significant energy input.
B. works even on very saline water, including seawater.
C. is very fast.
D. requires the same amount of land area as any other method of water distillation.
Answer: A
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a. 1% b. 10% c. 25% d. 50% e. 75%
A falling potential support ratio (PSR) indicates the burden on the working population is lessening.
Answer the following statement true (T) or false (F)
What aluminosilicate polymorph is stable at a pressure of 1 kilobar and a temperature of 700 degrees C?
A) andalusite and kyanite B) sillimanite and kyanite C) andalusite and sillimanite D) andalusite, sillimanite and kyanite
The tapering off of a process, pattern, or event over a distance is known as:
A) intervening opportunity. B) transferability. C) distance decay. D) mobility. E) time-space convergence.