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Hertz, Heinrich Rudolf

(Encyclopedia)Hertz, Heinrich Rudolf hĕrts [key], 1857–94, German physicist. He confirmed J. C. Maxwell's electromagnetic theory and in the course of experiments (1886–89) produced and studied electromagnetic...

hertz

(Encyclopedia)hertz hûrts [key] [for Heinrich R. Hertz], abbr. Hz, unit of frequency, equal to 1 cycle per second. The term is combined with metric prefixes to denote multiple units such as the kilohertz (1,000 Hz...

Hertz, Gustav

(Encyclopedia)Hertz, Gustav go͝osˈtäf hĕrts [key], 1887–1975, German physicist. He is noted for his work on the atom, and he shared with James Franck the 1925 Nobel Prize in Physics for research (1914) on the...

Rudolf I

(Encyclopedia)Rudolf I or Rudolf of Hapsburg ro͞oˈdŏlf [key], 1218–91, German king (1273–91), first king of the Hapsburg dynasty. Rudolf's election as king ended the interregnum (1250–73), during which tim...

Rudolf

(Encyclopedia)Rudolf, 1858–89, Austrian archduke, crown prince of Austria and Hungary; only son of Emperor Francis Joseph and Empress Elizabeth. Upon his mysterious death at Mayerling near Vienna (officially decl...

Hess, Rudolf

(Encyclopedia)Hess, Rudolf, 1894–1987, German National Socialist leader, b. Alexandria, Egypt; son of a German merchant. In 1920 he became an ardent follower of Adolf Hitler and after the Munich “beer-hall puts...

Friml, Rudolf

(Encyclopedia)Friml, Rudolf (Charles Rudolf Friml) frĭmˈəl [key], 1879–1972, American composer, b. Prague. Friml lived in the United States after 1906. The best-known of his 33 light operas are The Firefly (19...

Serkin, Rudolf

(Encyclopedia)Serkin, Rudolf, 1903–91, Austrian-American pianist, b. Bohemia. Serkin gave joint recitals with Adolf Busch (his father-in-law from 1935) and made his U.S. debut (1933) with the Busch chamber player...

Rudolf II

(Encyclopedia)Rudolf II, 1552–1612, Holy Roman emperor (1576–1612), king of Bohemia (1575–1611) and of Hungary (1572–1608), son and successor of Holy Roman Emperor Maximilian II. Acceding to the Hapsburg la...

Rudolf, Lake

(Encyclopedia)Rudolf, Lake: see Turkana, Lake.