discharge+itself
121economic systems — Introduction the way in which humankind has arranged for its material provisioning. One would think that there would be a great variety of such systems, corresponding to the many cultural arrangements that have characterized human society.… …
122Electric vehicle battery — Further information: Rechargeable electricity storage system For the starting, lighting and ignition system battery of an automobile, see Automotive battery. A Mitsubishi i MiEV having its batteries installed in Japan …
123spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
124Mackenzie River — River system, Northwest Territories, Canada. It flows northward from Great Slave Lake into the Beaufort Sea of the Arctic Ocean. Its basin, with an area of 697,000 sq mi (1,805,200 sq km), is the largest in Canada. It is 1,025 mi (1,650 km) long… …
125Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
126photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
127Indo-China — • The most easterly of the three great peninsulas of Southern Asia, is bounded on the north by the mountains of Assam, the Plateau of Yun nan, and the mountains of Kwang si; on the east by the province of Kwang si (Canton), the Gulf of Tong king …
128Education — • In the broadest sense, education includes all those experiences by which intelligence is developed, knowledge acquired, and character formed. In a narrower sense, it is the work done by certain agencies and institutions, the home and the school …
