Improving ____ means using less energy to provide the same amount of work.
A. energy quality
B. proven reserves
C. energy resourcefulness
D. energy efficiency
E. tariffs
Answer: D
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Does it make sense to say that a textbook is about 99.9% empty space?
A. No. A textbook could only be considered to be 99.9% empty space if it were combusted. B. Yes. A textbook like all material things is made up of atoms, which are considered to be 99.9% empty space. C. No. A textbook is a solid and thus is quite dense. Therefore, it is not 99.9% empty space. D. No. Only gases are considered to be 99.9% empty space. Liquids and solids are not.
The dominant control in global sea surface temperature is
A) upwelling and thermocline zones. B) rising air along the equator. C) descending air in the subtropics. D) the supply of solar insolation.
What is an electric current, how does it flow in a wire, and about how fast do the electrons move?
What will be an ideal response?
What term refers to the amount of a substance a person ingests, inhales, or absorbs through the skin at a given time?
A. toxicity B. biomagnification C. persistence D. response E. dose