Which of the following is true of solar cells?
A. moderate net energy yield
B. little or no direct emissions of carbon dioxide
C. need for a backup system for cloudy days
D. easy to install and expand as needed
E. competitive costs for newer cells
Answer: C
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The Hawaiian term for lava with a jagged, rubbly surface is _____
a) pahoehoe b) aa c) haleakela d) poy e) Pele's hair
Which of the following countries has not joined the WTO?
A) Russia B) China C) United States D) Canada E) Germany
Rapidly declining crude death rates are found in which stage of the demographic transition?
A) Stage 1 B) Stage 2 C) Stage 3 D) Stage 4 E) Stage 5
Continents tend to have the oldest rocks in the center with younger rocks flanking the center. Explain this observation, with reference to cratons and exotic terranes
What will be an ideal response?