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3.7×10 7 J $1 of electricity at a cost of $0.10/kWh (the US average retail cost in 2009) [121] [122] [123] 4×10 7 J Energy from the combustion of 1 cubic meter of natural gas [124] 4.2×10 7 J Caloric energy consumed by Olympian Michael Phelps on a daily basis during Olympic training [125] 6.3×10 7 J
For example, if a shoe manufacturer who proposes a model in fifteen sizes wishes to produce a product in three different colors, he will have to manage 3 × 15, or 45 references. If it wants to make two models, one for large foot and one for thin foot, it will double again to 90 references.
The codes given in the chart below usually tell the length and width of the components in tenths of millimeters or hundredths of inches. For example, a metric 2520 component is 2.5 mm by 2.0 mm which corresponds roughly to 0.10 inches by 0.08 inches (hence, imperial size is 1008).
To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimeters; 1 cm – 0.39 inches; 1 cm – edge of a square of area 1 cm 2; 1 cm – edge of a cube of volume 1 mL; 1 cm – length of a coffee bean; 1 cm – approximate width of average fingernail
A piece of resistive material with electrical contacts on both ends. In an ideal case, cross-section and physical composition of the examined material are uniform across the sample, and the electric field and current density are both parallel and constant everywhere.
The phase velocity at which electrical signals travel along a transmission line or other cable depends on the construction of the line. Therefore, the wavelength corresponding to a given frequency varies in different types of lines, thus at a given frequency different conductors of the same physical length can have different electrical lengths.
Ten and a quarter inch gauge (or X scale) (10 + 1 ⁄ 4 in / 260 mm) is a large modelling scale, generally only used for ridable miniature railways. Model railways at this scale normally confine the scale modelling aspects to the reproduction of the locomotive and with steam locomotives the accompanying tender .
The material is often cross-linked through the use of electron beams, [6] peroxides, or moisture. This cross-linking creates the memory in the tubing so that it is able to shrink back to its original extruded dimensions upon heating, producing a material called heat-shrink tubing. For outdoor use, heat-shrink tubing often has a UV stabiliser added.