(Encyclopedia) atomic number, often represented by the symbol Z, the number of protons in the nucleus of an atom, as well as the number of electrons in the neutral atom. Atoms with the same atomic…
(Encyclopedia) ASCII or American Standard Code for Information Interchange, a set of codes used to represent letters, numbers, a few symbols, and control characters. Originally designed for teletype…
(Encyclopedia) average, number used to represent or characterize a group of numbers. The most common type of average is the arithmetic mean. See median; mode.
(Encyclopedia) Beth-baal-meonBeth-baal-meonbĕth-bāˈəl-mēˈən [key], town of Moab, E of the Jordan, now called Main (Jordan), 12 mi (19 km) SW of Hisban. It also appears as Baal-meon and Beth-meon.…
(Encyclopedia) PalamedesPalamedespăləmēˈdēz [key], in Greek mythology, crafty Greek hero of the Trojan War. Because he had exposed Odysseus when he tried to evade going to war, Odysseus falsely…
(Encyclopedia) Red Guards, in Chinese history, politically active students of the Cultural Revolution (1966–69), who organized units to carry out Mao Zedong's aim of rerevolutionizing Chinese society…
(Encyclopedia) Pseudo-Philo, early Jewish work extant in Latin, probably written originally in Hebrew and emanating from Palestine. It was attributed to Philo (c.20 b.c.–a.d. 50) because it…
(Encyclopedia) pitot static systempitot static systempētōˈ [key], device for measuring the rate at which a fluid flows. Among the principal applications of the device are an airspeed indicator for…
(Encyclopedia) nucleus, in physics, the extremely dense central core of an atom.
Following the discovery of radioactivity by A. H. Becquerel in 1896, Ernest Rutherford identified two types of…
(Encyclopedia) jungle [Hindustani jangal=desert, forest; from Skt. jangala=wasteland, uncultivated land], densest form of tropical forest (usually second growth or later) found throughout tropical…
