to discharge sheet
61Current sea level rise — This article is about the current and future rise in sea level associated with global warming. For sea level changes in Earth s history, see Sea level#Changes through geologic time. Sea level measurements from 23 long tide gauge records in… …
62Clean Water Act — For Clean Water Act of Ontario, Canada, see Clean Water Act (Ontario). Clean Water Act Full title Federal Water Pollution Control Amendments of 1972 Acronym CWA / Clean Water Act Enacted by the 92nd United …
63TEA laser — The CO2 TEA laser was invented in the late 1960s by Dr Jacques Beaulieu working at the Defence Research Establishment, Valcartier, in Quebec, Canada. The development was kept secret until 1970 when brief details were published.C K N Patel,… …
64Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
65Columbia River — Coordinates: 46°14′39″N 124°3′29″W / 46.24417°N 124.05806°W / 46.24417; 124.05806 …
66Laser printer — HP LaserJet 4200 series printer, installed atop high capacity paper feeder …
67Dam — This article is about structures for water impoundment. For other uses, see Dam (disambiguation). Hoover Dam, a concrete arch gravity dam in Black Canyon of the Colorado River. Lake Mead in the background is impounded by the dam …
68Static electricity — For the science of static charges see Electrostatics Static electricity refers to the accumulation of excess electric charge in a region with poor electrical conductivity (an insulator), such that the charge accumulation persists. The effects of… …
69Metalworking — Machining a bar of metal on a lathe. Metalworking is the process of working with metals to create individual parts, assemblies, or large scale structures. The term covers a wide range of work from large ships and bridges to precise engine parts… …
70Ritual washing in Judaism — Part of Judaic series of articles on Ritual purity in Judaism   …
