normal operating period
31Fuel economy-maximizing behaviors — (also known as green driving) describe techniques that drivers can use to optimize their automobile fuel economy. The energy in fuel consumed in driving is lost in many ways, including engine inefficiency, aerodynamic drag, rolling friction, and… …
32Marine mammals and sonar — A Humpback whale Active sonar, the transmission equipment used on some ships to assist with navigation, has been suggested[1] to be detrimental to the health and livelihood of some marine animals, although the precise mechanisms for this are not… …
33Overclocking — For other uses, see Overclocked. AMD Athlon XP overclocking BIOS setup on ABIT NF7 S. Front side bus frequency (external clock) has increased from 133 MHz to 148 MHz, and the clock multiplier factor has changed from 13.5 to 16.5… …
34Space Shuttle Challenger disaster — For more information about the final mission and crew of the Challenger, see STS 51 L. Space Shuttle Challenger s smoke plume after the in flight breakup that killed all seven crew members …
35Electrical Equipment in Hazardous Areas — Domestic electrical equipment in British homes is made and tested to a British Standard. The aim of the testing is to ensure that the equipment is fairly robust and has no exposed parts that can cause harm to the user. No other protection is… …
36Stuxnet — is a computer worm discovered in June 2010. It targets Siemens industrial software and equipment running Microsoft Windows.[1] While it is not the first time that hackers have targeted industrial systems,[2] it is the first discovered malware… …
37Judaism — This article is about the Jewish religion. For consideration of ethnic, historic, and cultural aspects of the Jewish identity, see Jews. Judaica (clockwise from top): Shabbat candl …
38Nottingham and District Tramways Company Limited — was a tramway operator from 1875 to 1897 based in Nottingham in the United Kingdom. Contents 1 Nottingham Tramways Company 1872 1875 2 Nottingham and District Tramways Company Limited 1875 1897 2.1 …
39Filling station — The still operating Skovshoved Filling Station from 1935 in Copenhagen, Denmark, designed by Arne Jacobsen …
40Spark spread — The spark spread is the theoretical gross margin of a gas fired power plant from selling a unit of electricity, having bought the fuel required to produce this unit of electricity. All other costs (operation and maintenance, capital and other… …
