How funny breaking chalk can be. Another video where you can see how you can integrate modern presantation technology into your lectures.
Topic were brittle materials an torsion. The experiment shows, that those tend to break in an angle of about 45° when a torsion is applied.
Again sorry for the less-than-optimal audio, but due to my sitting rather far in the back and due to the equipment, that is the best i can offer...
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