multi-layer coil
21Dacian bracelets — Dacian gold bracelet, dated to 1st century BC – 1st century AD, from Sarmizegetusa Romania [1][2] …
22Oscilloscope — This article is about current oscilloscopes, providing general information. For history of oscilloscopes, see Oscilloscope history. For detailed information about various types of oscilloscopes, see Oscilloscope types. Illustration showing the… …
23Tesla turbine — The Tesla turbine is a bladeless centrifugal flow turbine expander patented by Nikola Tesla in 1913. It is referred to as a bladeless turbine because it uses the boundary layer effect and not a fluid impinging upon the blades as in a conventional …
24Transmission electron microscopy — A TEM image of the polio virus. The polio virus is 30 nm in size.[1] Transmission electron microscopy (TEM) is a microscopy technique whereby a beam of electrons is transmitted through an ultra thin specimen, interacting with the specimen as it… …
25Oscilloscope history — This article discusses the history and gradual development of the Oscilloscope. Contents 1 Hand drawn oscillograms 2 Automatic paper drawn oscillograph 3 Photographic oscillograph 4 …
26Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after …
27Vapor-compression refrigeration — [ [http://web.me.unr.edu/me372/Spring2001/Vapor%20Compression%20Refrigeration%20Cycles.pdf The Ideal Vapor Compression Cycle] ] [ [http://iehmtu.edata center.com/toc/chapt r/ch18s82.html Scroll down to The Basic Vapor Compression Cycle and… …
28Sprung floor — A sprung floor is a floor that absorbs shocks giving it a softer feel. Such floors are considered the best available for dance and indoor sports and physical education.They enhance performance and greatly reduce injuries. Modern sprung floors are …
29Galileo (spacecraft) — Infobox Spacecraft Name = Galileo Orbiter Caption = Galileo is prepared for mating with the IUS booster Organization = NASA Major Contractors = Mission Type = Orbiter, fly by Flyby Of = Venus, Earth, 951 Gaspra, 243 Ida Satellite Of = Jupiter… …
30Refrigerator — Fridge and Freezer redirect here. For other uses, see Fridge (disambiguation) and Freezer (disambiguation). For other uses, see Refrigerator (disambiguation). See also: Refrigeration A side by side refrigerator …
