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41Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( …
42E85 in standard engines — ExperimentalE85 has an octane rating of 105, which is higher than typical commercial gasoline mixtures (octane ratings of 85 to 98); however, it does not burn as efficiently in traditionally manufactured internal combustion engines. Additionally …
43SHX fonts — AutoCAD font and shape files (SHX) are compiled from shape definition files (SHP). You can create or modify shape definition files with a text editor or word processor that saves files in ASCII format. The syntax of the shape description for each …
44Burying beetle — Nicrophorus americanus, American burying beetle Scientific classification Kingdom: Animalia …
45North Pacific right whale — North Pacific right whale[1] Si …
46Optical cavity — An optical cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser… …
47Shim (engineering) — In engineering, a shim is a thin and often tapered or wedged piece of material, used to fill small gaps or spaces between objects. Shims are typically used in order to support, adjust for better fit, or provide a level surface. Shims may also be… …
48Saddle — A saddle is a supportive structure for a rider or other load, fastened to an animal s back by a girth. The most common type is the equestrian saddle designed for a horse, but specialized saddles have been created for camels and other creatures.… …
49Regression toward the mean — In statistics, regression toward the mean (also known as regression to the mean) is the phenomenon that if a variable is extreme on its first measurement, it will tend to be closer to the average on a second measurement, and a fact that may… …
50Stairway — Stairs redirects here. For other uses, see Stairs (disambiguation). Staircase redirects here. For other uses, see Staircase (disambiguation). This article is about the construction. For the song by Led Zeppelin, see Stairway to Heaven. Stairways… …
