How does the usefulness of a natural resource change over time? What factors affect usefulness most?
What will be an ideal response?
Attitudes and technology change the usefulness of resources. Something is a natural resource when people value it
(attitude) and are able to utilize it in some way (technology). For example, whale oil used to be a natural resource
because people used it to burn in lamps. Now, we have better and cheaper sources of light, so whale oil is no longer
considered a valuable natural resource in most of the world.
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Possessing a rich set of options that allow it to handle copies when other methods are inappropriate, the ____ command can handle conversions to and from legacy EBCDIC to ASCII.
A. tee B. convert C. dd D. df
Where is the refrigerant piping run from a rack system to the individual refrigerated cases?
A) Through an exterior wall B) Refrigerant piping is not necessary because rack systems are self-contained. C) On top of the floor under a protective metal cover D) In trenches under the floor
Because most loads are ___________, power factor correction is accomplished by introducing capacitors in parallel with the system that requires power factor correction
A. inductive B. reactive C. resistive D. capacitive
To avoid freezing the water in the chiller during recovery:
A) Circulate the chiller water. B) Add nitrogen to the chiller. C) Turn off the condenser water pumps. D) Operate the chiller.