Of the following volcanic landforms, which one is a stratovolcano?
A. any one of the Hawaiian Islands
B. any one of the Azores Islands, Portugal
C. Mt. Hood, Oregon
D. Sunset Crater, Arizona
Answer: C
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A 2000-N bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is
A. 20 N. B. more than 2000 N. C. 200 N. D. 2000 N.
Which kriging method allows the use of one or more secondary variables?
A. disjunctive kriging B. indicator kriging C. cokriging D. block kriging
Which of the following amines will be most soluble in water?
A) 1-hexanamine B) N,N-dimethyl-1-hexanamine C) 1-butanamine D) 1,4-butanediamine
The toxicity of industrial pollutants may go unrecognized for all of the following reasons except
A. their harmful effects may be slow to develop. B. they often cause skin and eye irritation. C. they may be harmful only in some concentrations or circumstances. D. they cannot be tested for safety on all organisms.