The acceleration of any falling object that gains a velocity of 10 m/s each second is
A. 10 m/s2.
B. 10 m/s.
C. both of these
D. none of the above
Answer: A
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Carbon 14 is useful for archeological samples because it is effective back to approximately
____________________ years. Fill in the blank(s) with the appropriate word(s).
Metamorphic rocks are very common in the crystalline basement rocks of shields
Indicate whether the statement is true or false
What best explains the differences in the density gradients between 1930 and 1990 in Figure 13.9.2?
A) Suburbs grew rapidly in the second half of the 20th century along with construction of apartments and town-house projects in the periphery of the CBD. B) More jobs were created in the CBD and hence more people chose to live in the CBD by 1990. C) The outermost gradients reduced in density by 1990 because of encroaching agriculture. D) Improvements in mass transportation allowed people to move from the suburbs towards the CBDs between 1950 and 1990. E) Cities implemented restrictions on cars in the CBD and adjacent gradients starting in 1950. This resulted in a higher density living in the CBD by 1990.
Tom Vail's view that the Grand Canyon was formed by a single flooding event is an example of Catastrophism.
Answer the following statement true (T) or false (F)