The example shown is a(n) ______ website structure.
A. linear/tutorial
B. webbed
C. hierarchical
D. hybrid
Answer: A
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A magnetic field is created by an electric charge if the charge is
a. positive b. negative c. moving d. stationary e. any of the above
Although the data show only a correlation between the carbon dioxide concentration and the global average temperature, scientists have other reasons to think that a rise in the carbon dioxide concentration actually causes a rise in the global average temperature. All of the following statements are true. Which statements lend support to the idea that carbon dioxide is a cause of planetary warming?
A. We understand the physical mechanism of the greenhouse effect, through which carbon dioxide can increase a planet's temperature. B. Isotope ratios in atmospheric carbon dioxide show that much of the carbon dioxide in Earth's atmosphere today comes from the burning of fossil fuels. C. Models of the greenhouse effect successfully predict the temperatures of Venus and Mars from their atmospheric carbon dioxide amounts. D. Models of Earth's climate that include recent increases in the carbon dioxide concentration match observed temperature increases better than those that do not include it.
The Coulomb force between two charges can be attractive or repulsive
Indicate whether the statement is true or false
If a reaction involving hadrons were written at the quark level as , what is the quark composition of the unknown last particle?
A. udd
B. 
C. uds
D. 
E. More information is needed.