elastic mirror
51Eastern span replacement of the San Francisco — San Francisco – Oakland Bay Bridge (eastern span replacement) Artistic rendition of the new eastern span of the Bay Bridge seen from Treasure Island (ca. 2014) Official name To be determ …
52Manograph — Man o*graph, n. [Gr. ? thin, rare + graph: cf. F. manographe.] (Engin.) An optical device for making an indicator diagram for high speed engines. It consists of a light tight box or camera having at one end a small convex mirror which reflects a… …
53Pellucidar — For the novel of the same name, see Pellucidar (novel). Pellucidar Original map of Pellucidar, from the first edition of Pellucidar (1915) At the Eart …
54Piezoelectricity — is the ability of some materials (notably crystals and certain ceramics, including bone) to generate an electric potentialPrinciples of Instrumental Analysis. 6th Edition, 2007. Skoog, Holler, and Crouch. Chapter 1, Sec. 1C 4, Pg. 9.] in response …
55Disc brake — Close up of a disc brake on a car On automobiles, disc brakes are often located with …
56Boxing training — is the training method that boxers use in order to get more fit for their sport. This training method is often cited by medical doctors, boxing trainers, and writers as one of the most spartan forms of sports training.Fact|date=February 2007… …
57Sunglasses — For the Divine Brown song, see Sunglasses (song). Wearing sunglasses under direct sunlight: Large lenses offer good protection, but broad temple arms are also needed against stray light from the sides. Sunglasses or sun glasses are a form of… …
58Ripple tank — In physics and engineering, a ripple tank is a shallow glass tank of water used in schools and colleges to demonstrate the basic properties of waves. It is a specialized form of a wave tank. The ripple tank is usually illuminated from above, so… …
59Persianate society — Articleissues citationstyle = October 2008 jargon = October 2008 long = October 2008 OR = October 2008 weasel = October 2008A Persianate society (PerB|جوامع پارسی زبان Djāma ye Pārsīzabān ) is a society that is either based on, or strongly… …
60Navy Mark V — The Navy Mark V high altitude pressure suit was a full body pressure suit developed by the B.F. Goodrich Company and the U.S. Navy for wear in high altitude fighter aircraft operations. It is best known for its role as the Mercury Spacesuit worn… …
