cross-sectional length
71Retina — For the Retina display in the iPhone 4, see iPhone 4#Display. Retina Right human eye cross sectional view. Courtesy NIH National Eye Institute. Many animals hav …
72semiconductor device — ▪ electronics Introduction electronic circuit component made from a material that is neither a good conductor nor a good insulator (hence semiconductor). Such devices have found wide applications because of their compactness, reliability,… …
73Copper wire and cable — Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s.[1][2] The invention of the telephone in 1876 proved to be another early boon for copper wire.[3] Today, despite competition from… …
74Toyota A engine — Infobox Automobile engine name= A series engine family manufacturer=ToyotaThe A Series engines are a family of straight 4 internal combustion engines with displacement from 1.3 L to 1.8 L produced by Toyota Motor Corporation. The series has cast… …
75Screw thread — Internal and external threads illustrated using a common nut and bolt. The screw and nut pair can be used to convert torque into linear force. As the screw (or bolt) is rotated, the screw moves along its axis through the fixed nut, or the non… …
76radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… …
77stress — stressless, adj. stresslessness, n. /stres/, n. 1. importance or significance attached to a thing; emphasis: to lay stress upon good manners. 2. Phonet. emphasis in the form of prominent relative loudness of a syllable or a word as a result of… …
78Electric power transmission — Electric transmission redirects here. For vehicle transmissions, see diesel electric transmission. 400 kV high tension transmission lines near Madrid Electric power transmission or high voltage electric transmission is the bulk transfer of… …
79Rebar — This article is about reinforcing bar. For the company, see Rebar (Taiwan). For the art group, see Rebar art and design studio. A tied rebar beam cage. This will be embedded inside cast concrete to increase the tensile strength of the concrete. A …
80Horn speaker — A horn speaker is a loudspeaker which uses a horn to increase the overall efficiency of the driving element, typically a diaphragm driven by an electromagnet. The horn itself is a passive component and does not amplify the sound from the driving… …
