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Mexico Chiefs of State & Cabinet Members

Chiefs of State and Cabinet Members of Foreign Governments Date of Information: 10/30/2022[source] Pres. Andrés Manuel López Obrador Sec. of the Interior Adán Augusto Lopez Hernandez Sec.…

Hall effect

(Encyclopedia) Hall effect, experiment that shows the sign of the charge carriers in a conductor. In 1879 E. H. Hall discovered that when he placed a metal strip carrying a current in a magnetic…

Oberth, Hermann Julius

(Encyclopedia) Oberth, Hermann Julius, 1894–1989, Austro-German astronautical pioneer, b. Hermannstadt, Austria-Hungary (now Sibiu, Romania). Beginning his studies in astronautics before World War I…

Lenau, Nikolaus

(Encyclopedia) Lenau, NikolausLenau, Nikolausnēˈkōlous lāˈnou [key], pseud. of Nikolaus Niembsch Edler von StrehlenauNikolaus Niembsch Edler von Strehlenaunēmpsh ādˈlər fən shtrāˈlənou [key], 1802–50…

Tristram and Isolde

(Encyclopedia) Tristram and IsoldeTristram and Isoldetrĭsˈtrəm, ĭsōlˈdə, ĭzōlˈ– [key], medieval romance. The earliest extant version (incomplete) was written (c.1185) by Thomas of Britain in Anglo-…

Selected Biographies: E

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z More Biographies Don't see the biography you're looking for? Search 30,000+ biographies Biographies by Category Arts and…

DK Science: Heat Transfer

EVAPORATIONCONVECTIONCONDUCTIONRADIATIONFIND OUT MOREHeat energy can be transferred from one place to another by three main processes. In CONVECTION, heat energy is carried by the movement of…

John Hipple MITCHELL, Congress, OR (1835-1905)

Senate Years of Service: 1873-1879; 1885-1897; 1901-1905Party: Republican; Republican; RepublicanMITCHELL, John Hipple, a Senator from Oregon; born John Mitchell Hipple in Washington County,…