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What is half-life?
In science, a half-life is the amount of time it takes for half of a substance or entity to undergo some specified process.
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Asked 6/1/2010 8:27:25 AM
Updated 2/20/2016 12:17:24 AM
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Edited by yumdrea [2/20/2016 12:17:04 AM]
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In science, a half-life is the amount of time it takes for half of a substance or entity to undergo some specified process.

Added 2/20/2016 12:17:24 AM
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What is the principle of uniformitarianism?
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Updated 11/17/2015 1:20:05 AM
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Uniformitarianism is the principle or assumption that the same natural laws and processes that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe.
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Updated 8/7/2014 9:47:31 AM
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Updated 358 days ago|6/24/2024 8:41:01 AM
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Added 358 days ago|6/24/2024 8:41:01 AM
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