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Uploaded by kosasihiskandarsjah on Jan 3, 2008
Some materials were found to be the source of radiation itself, hence the term radioactivity.
Education
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@vmelkon no it wasnt.
mohdban 11 months ago
I love this show. It was on PBS long ago.
vmelkon 2 years ago
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@vmelkon no it wasnt.
mohdban 11 months ago
I love this show. It was on PBS long ago.
vmelkon 2 years ago