The magnetic field lines about a straight current-carrying wire are
A. elliptical.
B. spiral.
C. radial.
D. circular.
Answer: D
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For the following reaction, identify whether the compound in bold is behaving as an acid or a base. H3PO4 + H2O ? H2PO4- + H3O+
A. acid B. base C. neither D. both E. none of the above
What are fault-block mountains?
A) Mountains formed through folding and thrusting of the crust B) Mountains consisting of exposed batholiths C) Mountains that form by erosion of streams D) Mountains formed through crustal extension and normal faulting
A geographic feature that formed as a result of the melting of the ice sheets during the Holocene Epoch is the
A) Great Lakes. B) Mississippi River. C) St. Lawrence River. D) All of these are correct.
Now the world's second largest economy, behind only the United States, China accounts for a third of total world economic growth, and GNI per capita has risen faster there than in any other country
Indicate whether the statement is true or false.