A baseball is thrown at 20 km/h. If it were thrown at 60 km/h its kinetic energy would be
A. 12 times as much.
B. 9 times as much.
C. more than 12 times as much.
D. 3 times as much.
Answer: B
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Between 1800 and 2015, the percentage of the U.S. population living in urban areas increased from 5% to 81%.
Answer the following statement true (T) or false (F)
Despite their instability, over 70 barrier islands off the United States have been commercially developed
a. True b. False
An El Niño event would be expected to produce ____
a. dry conditions in Peru b. rains and floods in Australia c. dry conditions in Washington and Oregon d. rains and floods in Japan e. rains and floods in Mexico and California
A fundamental geologic principle holding that sedimentary rocks in a vertical sequence formed
one on top of the other so that the oldest layer is at the bottom whereas the youngest is at the top:a. principle of cross-cutting relationships b. principle of original horizontality c. principle of inclusions d. principle of lateral continuity e. principle of super position