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Data are values of qualitative or quantitative variables, belonging to a set of items

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layer. Issues specific to power: Power connections carry more current than data connections, as the voltage drop produced by high resistances wastes energy, causes heating of the connection, and … may cause malfunctions. To minimize the resistance, wires and contacts for power are often larger than those for data, but there is no specific reason not to use the same materials and similar physical …
answered Oct 9 '11 by Kevin Reid