Many utilities have put forth an ongoing effort to bring fuel cells into waste water treatment facilities (WWTF) where the production of ____________________ gas is common and can be used to supply fuel cells.
Fill in the blank(s) with the appropriate word(s).
methane
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Suppose you wanted to save seed from your own flower plants in your garden. Cultivars representing each of the three breeding systems are present in your garden. Rate each of the three systems by how successful you would be in having the same kinds of plants in your garden next year.
What will be an ideal response?
Satisficing is the practice of _____.
a. working at peak performance at all times b. evaluating each alternative rationally c. choosing a satisfactory rather than an optimum decision d. changing a decision to stay on track with a set schedule
A closed-loop system is practical only when
A) there is an adequate supply of water, it is of good quality, and local codes and regulations permit groundwater disposal. B) loops are closed vertically, because they take up significantly less space. C) loops are closed horizontally, because they are the most economical. D) the geology, hydrology, and land availability meet the requirements for system installation.
If the diode is made of silicon in Figure 16-1(b), what is the current?
A) 0 A B) 8.6 mA C) 10 mA D) 9.4 mA