Food production increases of the past 30 years have been attributed to either increases in areas of land under cultivation or increases in yields per hectare. In which region has the proportion of increased food supply attributed to increased areas under cultivation been the highest?
A) Middle East/North Africa
B) South America
C) Subsaharan Africa
D) East Asia
E) South Asia
C
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Answer the following statement(s) true (T) or false (F)
Unloading occurs in what type of system?
A. hydraulic B. mechanical C. pneumatic D. ventilation
At 5° F, the latent heat of vaporization for R-124 is 70.7 Btu/lb. This means that when 1 pound of R-124 vaporizes at 5° F, 70.7 Btu of heat are removed from the surroundings. How many pounds of R-124 must vaporize at 5° F in order to remove 25,992.966 Btu of heat from the surroundings? (Round answer to two decimal places.)
Fill in the blank(s) with the appropriate word(s).
GMAW is almost free from spatter because it uses a mode of metal transfer called ____________________ metal transfer.
Fill in the blank(s) with the appropriate word(s).