If several scientists get their way, a 2.2-pound hunk of metal -- the international prototype of the kilogram -- may soon be out of style. Like its six basic-units-of-measurement siblings before it -- ...

The kilogram finally has a precise meaning despite defying a rigorous definition for over a century. Delegates of the General Conference on Weights and Measures unanimously voted Nov. 16 in favor of a ...

Electrical or electronic quantities and units are crucial values to know in evaluating and describing the behavior, characteristics and physical properties of a circuit. This quiz can help you recall ...