26:06Learning
From the PhD Lab: How do biofilms help keep bacteria alive? - with Josh Horton
The Royal Institution
Perpendicular Line Slope
From the creator
u13 l2 t3 we1 Perpendicular Line Slope More free lessons at: http://www.khanacademy.org/video?v=ndPq7gbin7A
Published 2011-11-21 · Watch on YouTube ↗
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