quartz reinforced composite
11Epoxy — In chemistry, epoxy or polyepoxide is a thermosetting epoxide polymer that cures (polymerizes and crosslinks) when mixed with a catalyzing agent or hardener . Most common epoxy resins are produced from a reaction between epichlorohydrin and… …
12arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
13Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
14Graphite — For other uses, see Graphite (disambiguation). Graphite Graphite specimen General Category Native element mineral …
15Space Shuttle thermal protection system — The Space Shuttle thermal protection system (TPS) is the barrier that protects the Space Shuttle Orbiter during the searing 1650 °C (3000 °F) heat of atmospheric reentry. A secondary goal is to protect from the heat and cold of space while on… …
16Anthropology and Archaeology — ▪ 2009 Introduction Anthropology Among the key developments in 2008 in the field of physical anthropology was the discovery by a large interdisciplinary team of Spanish and American scientists in northern Spain of a partial mandible (lower… …
17Properties of concrete — Concrete has relatively high compressive strength, but significantly lower tensile strength, and as such is usually reinforced with materials that are strong in tension (often steel). The elasticity of concrete is relatively constant at low… …
18Ceramic — A Ming Dynasty porcelain vase dating 1403 1424 …
19Spain — /spayn/, n. a kingdom in SW Europe. Including the Balearic and Canary islands, 39,244,195; 194,988 sq. mi. (505,019 sq. km). Cap.: Madrid. Spanish, España. * * * Spain Introduction Spain Background: Spain s powerful world empire of the 16th and… …
20Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of …
