A scientist who uses carbon-14 dating is actually measuring the:

Creation v. Evolution: How Carbon Dating Works

the yucca mountain project for nuclear waste disposal:

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half of all uranium-238 atoms will decay into thorium-234 in approximately:

long-term effects of natural radioactive exposure will:

Динамик в порядке, в профиле стоит на полную громкость. музыку воспроизводит, и через наушники и через динамик.


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