In the mid-1950s, General Electric developed a new fuel cell, the ____________________ cell.
Fill in the blank(s) with the appropriate word(s).
PEM (Proton Exchange Membrane)
PEM
Proton Exchange Membrane
Proton Exchange Membrane (PEM)
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Soils in which of the following soil suborders would most likely have a prominent E horizon under the A horizon?
A) Udalfs B) Orthents C) Aquepts D) Udolls E) Ustox
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Is the convection tube or the horizontal air flow system more commonly used today for heat distribution from unit heaters and why?
What will be an ideal response?
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What are indicators of excessive heat?
What will be an ideal response?
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Most of the animals produced in the United States are raised for ______
a. work c. recreation b. food d. leather
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