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Northfleet

(Encyclopedia)Northfleet, town (1991 pop. 26,250), Kent, SE England. Shipbuilding and the production of cement and paper are the main industries. In the center of town is a Roman Catholic church designed by George ...

mks system

(Encyclopedia)mks system, system of units of measurement based on the metric system and having the meter of length, the kilogram of mass, and the second of time as its fundamental units. Other mks units include the...

Clarke, Samuel

(Encyclopedia)Clarke, Samuel, 1675–1729, English philosopher and divine. His chief interest was rational theology, and, although a critic of the deists, he was in sympathy with some of their ideas. He supported t...

Boscovich, Ruggiero Giuseppe

(Encyclopedia)Boscovich, Ruggiero Giuseppe ro͞od-jāˈrō jo͞ozĕpˈpā bôsˈkōvēch [key], 1711–87, Italian mathematician, astronomer, and physicist. He became a Jesuit and taught at Rome, Pavia, and Milan. ...

Morris

(Encyclopedia)Morris, family of prominent American landowners and statesmen. Richard Morris, d. 1672, left England after serving in Oliver Cromwell's army, became a merchant in Barbados, and emigrated to New York C...

acids and bases

(Encyclopedia)acids and bases, two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Another theory that provides a very broad ...

atomism

(Encyclopedia)atomism, philosophic concept of the nature of the universe, holding that the universe is composed of invisible, indestructible material particles. The theory was first advanced in the 5th cent. b.c. b...

Halley, Edmond

(Encyclopedia)Halley, Edmond hălˈē, hôˈlē [key], 1656–1742, English astronomer and mathematician. He is particularly noted as the first astronomer to predict the return of a comet and the first to point out...

centripetal force and centrifugal force

(Encyclopedia)CE5 Centripetal and centrifugal forces: When a ball is swung in a circle at the end of a string, centripetal and centrifugal forces act as shown above. centripetal force and centrifugal force, act...

Burckhardt, Johann Ludwig

(Encyclopedia)Burckhardt, Johann Ludwig or John Lewis bo͝orkˈhärt [key], 1784–1817, European explorer, b. Switzerland, educated in Germany. Supported by an English association for promoting African discovery,...