sound-absorbing coefficient
21Refrigeration — Commercial refrigeration Ice is used to refriger …
22Stirling engine — Alpha type Stirling engine. There are two cylinders. The expansion cylinder (red) is maintained at a high temperature while the compression cylinder (blue) is cooled. The passage between the two cylinders contains the regenerator …
23Volkswagen Jetta — Infobox Automobile name = Volkswagen Jetta aka = Volkswagen Atlantic Volkswagen Bora Volkswagen City Jetta Volkswagen Fox Volkswagen Sagitar Volkswagen Vento manufacturer = Volkswagen parent company = Volkswagen Group (Volkswagen AG) production …
24Transfer-matrix method (optics) — The transfer matrix method is a method used in optics and acoustics to analyze the propagation of electromagnetic or acoustic waves through a stratified (layered) medium. [Born, M.; Wolf, E., Principles of optics: electromagnetic theory of… …
25materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …
26Lead glass — Swarovski flacon. Lead glass is a variety of glass in which lead replaces the calcium content of a typical potash glass.[1] Lead glass contains typically 18–40 weight% lead(II) oxide (PbO), while modern lead …
27Metal foam — Foamed aluminium A metal foam is a cellular structure consisting of a solid metal, frequently aluminium, containing a large volume fraction of gas filled pores. The pores can be sealed (closed cell foam), or they can form an interconnected… …
28Boeing 747 — British Airways Bo …
29Lithium — (pronEng|ˈlɪθiəm) is a chemical element with the symbol Li and atomic number 3. It is a soft alkali metal with a silver white color. Under standard conditions, it is the lightest metal and the least dense solid element. Like all alkali metals,… …
30Radar — For other uses, see Radar (disambiguation). A long range radar antenna, known as ALTAIR, used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on Kwajalein Atoll …
