What is the net force of inertia and gravitational attraction combined?
A) Gravitational forces
B) Centrifugal forces
C) Tractive forces
D) All of these choices
C
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Wind is actually an indirect form of ____________________ energy
Fill in the blanks with correct word
Hydrocarbon emissions are a major contributor to smog formation
Indicate whether the statement is true or false.
If the trends in pesticide use over the past 30 years continue, we can expect that pesticide use will
A) drop to near zero in the next decade. B) continue to decrease slowly. C) increase gradually. D) double in the next 10 years.
The above map shows the percentage of each country's
A) population that lives in urban settlements. B) population that lives in the primate city. C) area that is urban. D) likelihood that cities are shock cities. E) cities that are central places.