Ten seconds after starting from rest, a skydiver in free fall has a speed of about
A. 100 m/s.
B. 10 m/s.
C. 500 m/s.
D. 50 m/s.
E. more than 500 m/s.
Answer: A
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The disk-shaped cloud that formed our solar system is called the solar nebula because:
A) the concentrated mass near the center eventually forms into the Sun. B) it is whirled around by solar wind. C) the spinning disk was infinitely brighter than the rest of the solar system. D) None of the above is correct.
Which of the following locations would form a hydrothermal rock?
A. location 1 B. location 2 C. location 3 D. location 4 E. locations 2 and 3
A(n) ________ is the term used to describe the portion of a resource that has been discovered or inferred with some degree of certainty and can be extracted for a profit.
A. reserve B. gangue C. resource D. ore E. renewable
The dominant feature of a traditional Islamic city is
A) the sultan's palace. B) the principal mosque, the Jami. C) the main marketplace, the suq. D) the Kasbah. E) the cemetery.