closed evaporation system
71Drought in the United Kingdom — Droughts in the United Kingdom are a relatively common feature of the weather in the UK, with one around every 5–10 years on average. These droughts are usually confined to summer, when a blocking high causes hot, dry weather for an extended… …
72ZIONISM — This article is arranged according to the following outline: the word and its meaning forerunners ḤIBBAT ZION ROOTS OF ḤIBBAT ZION background to the emergence of the movement the beginnings of the movement PINSKER S AUTOEMANCIPATION settlement… …
73Vacuum distillation — At atmospheric pressure, dimethyl sulfoxide boils at 189°C. Under a vacuum, it distills off into the connected receiver at only 70°C. Vacuum distillation is a method of distillation whereby the pressure above the liquid mixture to be distilled is …
74Thermosiphon — (alt. thermosyphon) refers to a method of passive heat exchange based on natural convection which circulates liquid in a vertical closed loop circuit without requiring a conventional pump. Its intended purpose is to simplify the pumping of liquid …
75Economy of the People's Republic of China — Economies of Special Administrative Regions of Hong Kong and Macau are administered separately from the rest of People s Republic of China. Therefore, the information below pertains only to mainland China unless specified otherwise. For the… …
76sensory reception, human — Introduction means by which humans react to changes in external and internal environments. Ancient philosophers called the human senses “the windows of the soul,” and Aristotle described at least five senses sight, hearing, smell, taste, and… …
77General relativity — For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. General relativity Introduction Mathematical formulation Resources …
78Phase (matter) — In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform.[1] Examples of physical properties include density, index of refraction, and chemical …
79Arabian Desert — 1. a desert in Egypt between the Nile valley and the Red Sea. ab. 80,000 sq. mi. (207,000 sq. km). 2. the desert region in the N part of the Arabian peninsula. * * * Desert region, Arabian Peninsula. It covers about 900,000 sq mi (2,330,000 sq… …
80tropical cyclone — a cyclone that originates over a tropical ocean area and can develop into the destructive storm known in the U.S. as a hurricane, in the western Pacific region as a typhoon, and elsewhere by other names. Cf. extratropical cyclone, hurricane (def …
