natural elasticity
71Balance wheel — in a cheap 1950s alarm clock, the Apollo, by Lux Mfg. Co. showing the balance spring (1) and regulator (2) …
72Optical mineralogy — A petrographic microscope, which is an optical microscope fitted with cross polarizing lenses, a conoscopic lens, and compensators (plates of anisotropic materials; gypsum plates and quartz wedges are common), for crystallographic analysis.… …
73Price of petroleum — This article is about the price of crude oil. For information about derivative motor fuels, see gasoline and diesel usage and pricing. For detailed history of price movements since 2003, see 2003 to 2011 world oil market chronology. Brent barrel… …
74New environmental policy instruments — New Instruments of Environmental Policy (NEPIs) have in begun to be adopted by advanced societies in recent years with increasing vigour. Although forms of environmental policy have been around for many decades, the idea of placing more market… …
75distribution theory — ▪ economics Introduction in economics, the systematic attempt to account for the sharing of the national income among the owners of the factors of production land, labour, and capital. Traditionally, economists have studied how the costs of …
76Non-invasive intracranial pressure measurement methods — Increased intracranial pressure (ICP) is one of the major causes of secondary brain ischemia that accompanies a variety of pathological conditions, most notably, traumatic brain injury (TBI), stroke, and intracranial hemorrhages. However, aside… …
77Labour economics — seeks to understand the functioning of the market and dynamics for labour. Labour markets function through the interaction of workers and employers. Labour economics looks at the suppliers of labour services (workers), the demanders of labour… …
78Stephen Timoshenko — Stephen P. Timoshenko or Stepan Prokofyevich Timoshenko ( ua. Степан Тимошенко, ru. Степан Прокофьевич Тимошенко, December 22 1878 ndash; May 29 1972), is reputed to be the father of modern engineering mechanics. He wrote many of the seminal… …
79spider — spiderless, adj. spiderlike, adj. /spuy deuhr/, n. 1. any of numerous predaceous arachnids of the order Araneae, most of which spin webs that serve as nests and as traps for prey. 2. (loosely) any of various other arachnids resembling or… …
80musical sound — Introduction any tone with characteristics such as controlled pitch and timbre. The sounds are produced by instruments in which the periodic vibrations can be controlled by the performer. That some sounds are intrinsically musical,… …
