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Electricity (from Greek ήλεκτρον (electron) "amber") is a general term for the variety of phenomena resulting from the presence and flow of electric charge.
Electric potential (often referred to as voltage) - the potential energy per unit charge associated with a static electric field.
In science and engineering, conductors are materials that contain movable charges of electricity.
So what is the bus conductor doing in his capacity?
Resistance: Resistance movement, a group trying to thwart foreign occupation.
Electrical resistance, the degree to which a passing electric current is dissipated into heat.
Signal... (ie stop/go)...a signal is any time-varying quantity.
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Precedent said, "It cannot be done;" experience said, "It is done."
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