(Encyclopedia) thermionic emissionthermionic emissionthûrmˌīŏnˈĭk [key], emission of electrons or ions by substances that are highly heated, the charged particles being called thermions. The number…
Weights in the parenthesis are as follows: (snatch-clean & jerk—total weight), all converted to pounds. In the event of a tie, medals are awarded based on body weight from lightest to heaviest…
HOW ARE SOUNDS MADE? HOW DO MUSICAL INSTRUMENTS MAKE MUSIC? WHY ARE SOUNDS DIFFERENT? WHAT IS RESONANCE? SOUND FREQUENCY SOUND WAVESDIGITAL SOUNDFIND OUT MOREOur world is full of sounds. Sound is…
(Encyclopedia) May Fourth Movement (1919), first mass movement in modern Chinese history. On May 4, about 5,000 university students in Beijing protested the Versailles Conference (Apr. 28, 1919)…
Here are the key news events of the month organized into three categories: World News, U.S. News, and Business, Society, and Science News. World | Nation | Business/…
(Encyclopedia) Villard, HenryVillard, Henryvĭlärdˈ [key], 1835–1900, American journalist and financier, b. Germany. His first name was originally Hilgard. He attended universities in Germany, and…
Killing Gun ControlThe Supreme CourtSeparating Government PowersWho's in Control—the States or the Federal Government?Killing Gun ControlSupporting Family LeaveAccepting Homosexuality…
(Encyclopedia) microphone, device for converting sound into electrical energy, used in radio broadcasting, recording, and sound amplifying systems. Its basic component is a diaphragm that responds to…
(Encyclopedia) robot or automatonrobotôtämˈətänˌ [key] mechanical device designed to perform the work generally done by a human being. The Czech dramatist Karel Čapek popularized the expression […
