A pulley system raises a 1000-N load with 100 N of input force. The efficiency of the system is
A) 10 percent.
B) 90 percent.
C) 100 percent.
D) 1000 percent.
E) not enough information given
E
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Which of the following would probably not be involved in a structural adjustment plan?
A. more efficient government B. import substitution C. privatization D. reduced government involvement in the economy
Monsoons are most dramatic on this continent:
A) North America. B) Europe. C) South America. D) Asia.
Fossil fuels represent ________
A) natural deposits of organic materials that formed long before life on Earth evolved B) plants and algae buried millions of years ago C) sustainable sources of energy that are underused today D) the remains of fossil animals that lived a few thousand years ago
Atoms of which of the following elements are smallest?
A) Rb B) K C) Na D) None, they are all the same size.