Although it is difficult to get a precise number of active volcanoes, a common estimate is about ____
A)100
B)250
C)550
D)1100
E)2000
C
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As a golf ball falls after rolling off the edge of a table, its horizontal component of motion
A. remains constant. B. increases. C. decreases. D. cannot be analyzed.
Answer the following statement(s) true (T) or false (F)
1. European rulers encouraged African manufacturing development. 2. Reliance on exports of raw materials has raised local incomes in Africa South of the Sahara. 3. After the end of the Cold War, outside countries that had sought allies in Africa ignored them. 4. African cultural, economic, and political values encourage small families. 5. The restructuring programs of the International Monetary Fund and the World Bank are appropriate for the countries of Africa South of the Sahara.
Most silicate minerals form from ________
A) earthquakes B) meteorite impacts C) erosional processes D) molten rock
Which of the following are produced when acetic anhydride reacts with methanol?
A) only propanoic acid B) only methyl acetate C) formic acid and methyl acetate D) acetic acid and methyl acetate