(Encyclopedia)
CE5
Image formation by curved mirrors and lenses
reflection, return of a wave from a surface that it strikes into the medium through which it has traveled. The general principles…
(Encyclopedia) refraction, in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from…
(Encyclopedia)
CE5
NevadaNevadanəvădˈə, –vä– [key], far western state of the United States. It is bordered by Utah (E), Arizona (SE), California (SW, W), and Oregon and Idaho (N).
In the…
Maryland State Facts
Entered Union: April 28, 1788 (7th State)
Present constitution adopted: 1867
Fun Facts
State abbreviation/Postal code: Md./MD
Nicknames: Free State; Old Line State…
Their history and their resurgence by Laura Hayes, Borgna Brunner, and Beth Rowen Infoplease Atlas: Afghanistan Taliban ambassador to Pakistan Abdul Salam Zaeef seated in front of…
(Encyclopedia)
CE5
AlaskaAlaskaəlăˈskə [key], largest in area of the United States but one of the smallest in population, occupying the northwest extremity of the North American continent,…
(Encyclopedia) tariff, tax on imported and, more rarely, exported goods. It is also called a customs duty. Tariffs may be distinguished from other taxes in that their predominant purpose is not…
(Encyclopedia) Cleveland, Grover (Stephen Grover Cleveland), 1837–1908, 22d (1885–89) and 24th (1893–97) President of the United States, b. Caldwell, N.J.; son of a Presbyterian clergyman. Cleveland'…
(Encyclopedia) Suez Canal, Arab. Qanat as Suways, waterway of Egypt extending from Port Said to Port Tawfiq (near Suez) and connecting the Mediterranean Sea with the Gulf of Suez and thence with the…
