Half life

Half life

The length of time it takes half of an amount of radioactive material to decay.

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Industry/Domain: Mathematics
Category: Algebra
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Related terms

half-life

Internet; Internet communication

A measurement for the amount of time a radioactive substance takes to lose half of its atoms. In technology, it refers to the amount of time that it takes for a storage device to ...

half-life

Energy; Nuclear energy

The time in which one half of the atoms of a particular radioactive substance disintegrate into another nuclear form. Measured half-lives vary from millionths of a second to ...

half-life

Natural environment; Coral reefs

The time required for a radioactive substance to lose half of its nuclei.

half-life

Medical devices; Radiology equipment

The time any substance takes to decay by half of its original amount. See also biological half-life, decay constant, effective half-life, radioactive half-life.

half-life

Printing & publishing; Publishing

The time it takes for a sensational news item to migrate from a front-page (qv) report to a back-page filler (qv), or for a spectacular entertainment to lose public interest; ...

half-life

Archaeology; Evolution

The amount of time it takes for one-half of the atoms of a radioactive material to decay to a stable form. For example, the half-life of carbon-14 is 5,568 years.

Antikythera mechanism

Mathematics; Algebra

The Antikythera mechanism is an analog computer that was used by the Greeks more than 2000 years ago to locate and predict the positions of celestial objects. When new, the device ...