Dennis's speed increases after he dives from a hovering helicopter. Relative to an observer in the helicopter, the momentum of Dennis
A. also increases.
B. decreases.
C. remains unchanged.
D. all of the above
Answer: A
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Which is not a reason why a refined oil spill is more harmful?
a. The oil contains more energy potential due to additives during the refinement process. b. There are more biologically active components remaining in refined oil. c. The refining process removes heavier components. d. There are components that are added to oil which are deadly.
The climate type found in most of the southeast United States is:
a. humid subtropical, year-round precipitation. b. marine west coast, year-round precipitation. c. humid subtropical, winter drought. d. marine west coast, winter drought.
Chlorinated hydrocarbons have ________ toxicity for sensitive organisms and remain in the soil for a ________ time.
A. Medium; long B. High; long C. Low; short D. Low; long E. High; short
Territorial claims on a neighbor are called ________
Fill in the blank(s) with the appropriate word(s).