peak-reading circuit
51Subprime mortgage crisis — Part of a series on: Late 2000s financial crisis Major dimensions …
52chromatography — chromatographer, n. chromatographic /kreuh mat euh graf ik, kroh meuh teuh /, adj. chromatographically, adv. /kroh meuh tog reuh fee/, n. Chem. the separation of mixtures into their constituents by preferential adsorption by a solid, as a column… …
53photography, 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… …
54South Dakota — This article is about the U.S. state of South Dakota. For other uses, see South Dakota (disambiguation). State of South Dakota …
55Railways in Melbourne — Melbourne rail network  City Loop  Caulfield group  Frankston line  Pakenham line  Sandringham line  Cranbourne line …
56electricity — /i lek tris i tee, ee lek /, n. 1. See electric charge. 2. See electric current. 3. the science dealing with electric charges and currents. 4. a state or feeling of excitement, anticipation, tension, etc. [1640 50; ELECTRIC + ITY] * * *… …
57Mountaineering — Alpinist redirects here. For the magazine, see Alpinist (magazine). For the practice of closed circuit diving without a bailout, see Rebreather#Bailout. Mountaineer redirects here. For other uses, see Mountaineer (disambiguation). Basecamp… …
58Operational amplifier — A Signetics μa741 operational amplifier, one of the most successful op amps. An operational amplifier ( op amp ) is a DC coupled high gain electronic voltage amplifier with a differential input and, usually, a single ended output.[1] An op amp… …
59Crystal radio — Crystal set redirects here. For the Australian rock band, see The Crystal Set. A modern reproduction of an antique crystal set. It is tuned to different stations by moving the sliding contact (right) up and down the tuning coil (red). The device… …
60Mark B. Cohen — For other uses, see Mark Cohen (disambiguation). Mark B. Cohen Member of the Pennsylvania House of Representatives from the 202nd district Incumbent Assumed office 1974 Preceded by Eugene Gelfand …
