Frightened run-away pepper experiment – cohesion principles.

Black pepper (Piper nigrum) grain

We all know how glue or tape can be used to stick two objects together. These adhesives cause the two objects to cohere (or adhere) together. Cohesion is the word for this sticking force. Cohesion also occurs on common everyday objects – rain to a car’s windows, dust to the ceiling fan, chewing gum on…

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