Article: The role of the gas is to prevent evaporation of the filament, without introducing significant heat losses. For these properties, chemical inertness and high atomic or molecular weight is desirable. The presence of gas molecules knocks the liberated tungsten atoms back to the filament, reducing its evaporation and allowing it to be operated at higher temperature without reducing its life (or, for operating at the same temperature, prolongs the filament life). It however introduces heat losses (and therefore efficiency loss) from the filament, by heat conduction and heat convection.

Question: How do gases prevent evaporation of the filament?
Ans: The presence of gas molecules knocks the liberated tungsten atoms back to the filament


Article: Since the formal adoption of digital video broadcasting's (DVB) widescreen HDTV transmission modes in the early 2000s; the 525-line NTSC (and PAL-M) systems, as well as the European 625-line PAL and SECAM systems, are now regarded as standard definition television systems.

Question: What does DVB stand for?
Ans: digital video broadcasting


Article: Societies tend to come and go, of course, depending on the special enthusiasms of the masters and boys in the school at the time, but some have been in existence many years. Those in existence at present include: Aeronautical, African, Alexander Cozens (Art), Amnesty, Archeological, Architectural, Astronomy, Banks (conservation), Caledonian, Cheese, Classical, Comedy, Cosmopolitan, Debating, Design, Entrepreneurship, Geographical, Henry Fielding, Hispanic, History, Keynes (economics), Law, Literary, Mathematical, Medical, Middle Eastern, Model United Nations, Modern Languages, Oriental, Orwell (left-wing), Simeon (Christian), Parry (music), Photographic, Political, Praed (poetry), Rock (music), Rous (equestrian), Salisbury (diplomatic), Savile (Rare Books and Manuscripts), Shelley, Scientific, Sports, Tech Club, Theatre, Wellington (military), Wine and Wotton’s (philosophy).

Question: What is the name of the Eton club for musical interests?
Ans: Rock


Article: Voiceless consonants are produced with the vocal folds open (spread) and not vibrating, and voiced consonants are produced when the vocal folds are fractionally closed and vibrating (modal voice). Voiceless aspiration occurs when the vocal cords remain open after a consonant is released. An easy way to measure this is by noting the consonant's voice-onset time, as the voicing of a following vowel cannot begin until the vocal cords close.

Question: What is created when the vocal folds are spread and do not vibrate?
Ans:
Voiceless consonants