Which of the following statements contains accurate information regarding power sources for manufacturing in the first half of the 19th century?
a. Steam engines were very costly to operate.
b. The water turbine was more efficient than the water wheel.
c. Coal was adopted more slowly in the U.S. than in England.
d. Along the Ohio River, steam was preferable to water power because of variable stream levels.
e. All of above.
Question 2
Which of the following statements best describes the changes in federal spending of the US economy from 1939 to 1949?
a. Between 1939 and 1944 military expenditures increased substantially and civilian-related expenditures remained about the same.
b. Between 1939 and 1944 both military and civilian-related expenditures increased substantially.
c. Between 1939 and 1944 the production possibilities frontier for military and civilian-related expenditures shifted out.
d. Between 1944 and 1949 military expenditures decreased substantially and civilian-related expenditures returned to 1939 levels.
A comparison of the sizes of various chemical and biological structures, and the resolving power of
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