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Mach's principle

(Encyclopedia)Mach's principle mäks [key] [for E. Mach], assertion that the inertial effects of mass are not innate in a body, but arise from its relation to the totality of all other masses, i.e., to the universe...

looper

(Encyclopedia)looper, name for caterpillars that move with a looping motion, including the inchworm and the cabbage looper. ...

Lenz's law

(Encyclopedia)Lenz's law, physical law, discovered by the German scientist H. F. E. Lenz in 1834, that states that the electromotive force (emf) induced in a conductor moving perpendicular to a magnetic field tends...

Krusenstjerna, Agnes von

(Encyclopedia)Krusenstjerna, Agnes von ängˈnās vôn kro͞osĕnshĕrˈnä [key], 1894–1940, Swedish novelist. Krusenstjerna's works reflect the aristocratic and emotionally disturbed background from which she c...

Osborne, Dorothy

(Encyclopedia)Osborne, Dorothy ŏzˈbərn [key], later Lady Temple, 1627–95, English letter writer. The daughter of a royalist, she became engaged to Sir William Temple against the wishes of her family. Her lette...

Democritus

(Encyclopedia)Democritus dĭmŏkˈrĭtəs [key], c.460–c.370 b.c., Greek philosopher of Abdera; pupil of Leucippus. His theory of the nature of the physical world was the most radical and scientific attempted up ...

motor, electric

(Encyclopedia)CE5 Motor: In the AC motor, current fed to the conducting loop of wire causes it to rotate in the magnetic field, thus turning the shaft on which the loop is mounted. In the DC motor, the direction...

animated cartoon

(Encyclopedia)animated cartoon: see Nontheatrical Film under motion pictures. ...

Kael, Pauline

(Encyclopedia)Kael, Pauline kāl [key], 1919–2001, American film critic, b. Petaluma, Calif. Possessed of extremely strong opinions about movies and a feisty, pop-inflected style, Kael was noted for her provocati...

sound recording

(Encyclopedia)sound recording, process of converting the acoustic energy of sound into some form in which it can be permanently stored and reproduced at any time. In 1855 the inventor Leon Scott constructed a devic...