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physics

(Encyclopedia)physics, branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th cent. and is still known by this na...

drama, Western

(Encyclopedia)drama, Western, plays produced in the Western world. This article discusses the development of Western drama in general; for further information see the various national literature articles. During ...

Australia

(Encyclopedia)CE5 Australia ôstrālˈyə [key], smallest continent, between the Indian and Pacific oceans. With the island state of Tasmania to the south, the continent makes up th...

Ethiopia

(Encyclopedia)CE5 Ethiopia ēthēōˈpēə [key], officially Federal Democratic Republic of Ethiopia, republic (2021 ...

Yemen

(Encyclopedia)CE5 Yemen yĕmˈən [key], officially Republic of Yemen, republic (2015 est. pop. 26,916,000), 207,300 sq mi (535,800 sq km), SW Asia, at the southern edge of the Arabian peninsula. The present nat...

Nigeria

(Encyclopedia)CE5 Nigeria nījĭrˈēə [key], officially Federal Republic of Nigeria, republic (2015 est. pop. 181,182,000), 356,667 sq mi (923,768 sq km), W Africa. It borders on the Gulf of Guinea (an arm of ...

Poland

(Encyclopedia)CE5 Poland, Pol. Polska, officially Republic of Poland, republic (2015 est. pop. 38,265,000), 120,725 sq mi (312,677 sq km), central Europe. It borders on Germany in the west, on the Baltic Sea and...

Ukraine

(Encyclopedia)CE5 Ukraine yo͞oˈkrān, yo͞okrānˈ [key], Ukr. Ukraina, republic (2015 est. pop. 44,658,000), 232,046 sq mi (601,000 sq km), E Europe. It borders on Poland in the northwest; on Slovakia, Hungar...

Iran

(Encyclopedia)CE5 Iran ēränˈ, ĭrănˈ [key], officially Islamic Republic of Iran, republic (2015 est. pop. 79,360,000), 636,290 sq mi (1,648,000 sq km), SW Asia. The country's name was changed from Persia to...

Iraq

(Encyclopedia)CE5 Iraq or Irak both: ēräkˈ, ĭrăkˈ [key], officially Republic of Iraq, republic (2005 est. pop. 26,075,000), 167,924 sq mi (434,924 sq km), SW Asia. Iraq is bordered on the south by Kuwait, ...