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DK Science & Technology: Motion

WHAT IS ACCELERATION? HOW IS SPEED MEASURED? FRICTIONFIND OUT MOREFrom molecules in this sheet of paper, to planets in orbits, the objects around us are in constant motion. The simplest motion is…

Kid Work

Don’t fear if you’re too young to get a job at a restaurant or store. There are plenty of ways to earn money to buy that hot new CD, videogame or pair of jeans. Try selling these products and…

Frederick R. Weisman

businessman, art collector, philanthropistBorn: 1912Birthplace: Minneapolis, Minn. Weisman embodies the stereotypical American Dream. Raised in a household headed by his Russian immigrant parents,…

Linda Hunt

actressBorn: 4/2/1945Birthplace: Morristown, New Jersey Despite her small stature (she is 4' 9"), Hunt opted to risk typecasting and pursue a career in the spotlight. Playing a male dwarf opposite…

Members of Congress: Maryland, Congress,

Biographies of U.S. representatives and senators from Maryland Member Name Birth-Death ALBERT, William Julian 1816-1879 ALEXANDER, Robert 1740-1805 ANDREWS, William Noble 1876-…

William C. Durant

manufacturerBorn: 12/8/1861Birthplace: Boston, Mass. He quit high school to begin work in his grandfather's Flint, Michigan, lumberyard. By 1885 he had organized the Flint Road Cart Company, which…

Emergency cords

The Question: Why do trains have emergency cords available to the public? Is there EVER a case where a passenger pulling the cord would be the right course of action…

DK Science: Pitch

HEARING ABILITYDOPPLER EFFECTULTRASOUNDFIND OUT MORESound can be low-pitched, like the rumble of a large truck, or high-pitched, like a whistle. The pitch of a sound depends on the frequency of…