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DK Science: Generators

WIND TURBINEHOW AN ALTERNATOR WORKS 1HOW AN ALTERNATOR WORKS 2WIND FARMFIND OUT MOREGenerators convert energy from such sources as oil, gas, and wind into electrical energy. Like motors, they use…

DK History: Mediterranean Seafarers

WHAT MADE THE TRADERS SO PROSPEROUS? MINOANSPHOENICIANSFIND OUT MOREFrom around 2000 BC, people living close to the Mediterranean Sea, such as the MINOANS, Mycenaeans, and PHOENICIANS, built…

The Supreme Court and Federalism

The framers of the Constitution sought to balance the rights of the several states and the powers of the new federal government. Their solution was a federal system, which divides powers between the…

Algebra: Multiplying Polynomials

Multiplying Polynomials Algebra Introducing Polynomials Classifying Polynomials Adding and Subtracting Polynomials Multiplying Polynomials Dividing Polynomials Unlike addition and…

Best Architecture in U.S. Cities

Each year Travelandleisure.com and CNN Headline News ask more than 60,000 Americans what they like—and don't like—about 25 large American cities and used…

Best Architecture in U.S. Cities

Each year Travelandleisure.com and CNN Headline News ask more than 60,000 Americans what they like—and don't like—about 25 large American cities and used…

Top 25 U.S. Cities for Culture

Each year Travelandleisure.com posts an online survey asking Americans what they like—and don't like—about 35 large U.S. cities and use the poll results…

Best People in U.S. Cities

In early 2007, Travelandleisure.com and CNN Headline News asked more than 60,000 Americans what they like—and don't like—about 25 large American cities and used the poll results to rank the cities…

Best Restaurants in U.S. Cities

In early 2007, Travelandleisure.com and CNN Headline News asked more than 60,000 Americans what they like—and don't like—about 25 large American cities and…

Best Restaurants in U.S. Cities

In 2009, Travelandleisure.com asked more than 60,000 Americans what they like—and don't like—about 30 large American cities and used the poll results to…