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Surface Tension of a Blood Drop (Screencast)


Author: Daniel Feucht
Subject: Law, Public Safety, Corrections & Security
Source: Wisc-Online
Creative Commons Attribution-NonCommercial Image

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Description
This screencast shows how blood droplets are held together by a strong cohesive molecular force that produces surface tension in each drop and on the external force. Surface tension pulls the surface molecules of a liquid toward its interior, decreasing the surface area and causing the liquid to resist penetration.
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