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pendulum

(Encyclopedia) pendulum, a mass, called a bob, suspended from a fixed point so that it can swing in an arc determined by its momentum and the force of gravity. The length of a pendulum is the…

clock

(Encyclopedia) CE5 A pendulum clock: Weight-driven clock mechanism clock, instrument for measuring and indicating time. Predecessors of the clock were the sundial, the hourglass, and the…

Robinson, Sugar Ray

(Encyclopedia) Robinson, Sugar Ray, 1920–89, American boxer, b. Detroit as Walker Smith, Jr. He began boxing after three years of high school in New York City. Having won all his amateur fights (…

Poopó

(Encyclopedia) PoopóPoopópōˌōpōˈ [key], salt lake, on the high plateau of W Bolivia. It is more than 11,000 ft (3,353 m) above sea level. Although it is Bolivia's second largest lake (965 sq mi/2,499…

Ratas, Jüri

(Encyclopedia) Ratas, Jüri, 1978–, Estonian political leader. A member of the Center party, a populist party with strong support among ethnic Russians, Ratas was mayor of Talinn (2005–7), before…

Baius, Michael

(Encyclopedia) Baius or Bajus, MichaelBaius or Bajus, Michaelbāˈyəs, bāˈjəs [key], 1513–89, Flemish Roman Catholic theologian, also known as Michel de Bay. He was chancellor of the Univ. of Louvain…

Djokovic, Novak

(Encyclopedia) Djokovic, Novak, 1987–, Serbian tennis player, b. Belgrade. He began winning European championships at age 14, and played in his first Grand Slam tournament, the Australian Open, in…