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'''Viscosity''' is a [[liquid]]'s resistance to flow. <ref>[http://antoine.frostburg.edu/cgi-bin/senese/searchglossary.cgi?query=viscosity&shtml=%2Fchem%2Fsenese%2F101%2Fglossary.shtml Fred Senese's online chemical glossary]</ref>  

'''Viscosity''' is a [[liquid]]'s resistance to flow. <ref>[http://antoine.frostburg.edu/cgi-bin/senese/searchglossary.cgi?query=viscosity&shtml=%2Fchem%2Fsenese%2F101%2Fglossary.shtml Fred Senese's online chemical glossary]</ref>  

*It describes the internal friction of a moving [[fluid]]. A fluid with large viscosity resists [[motion]] because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its [[molecular]] makeup results in very little friction when it is in motion. <ref> [http://www.princeton.edu/~gasdyn/Research/T-C_Research_Folder/Viscosity_def.html (Princeton University)] </ref>

*It describes the internal friction of a moving [[fluid]]. Friction acts tangentially opposite to the direction of relative motion between adjacent layers of the fluid. A fluid with large viscosity resists [[motion]] because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its [[molecular]] makeup results in very little friction when it is in motion.       <ref> [http://www.princeton.edu/~gasdyn/Research/T-C_Research_Folder/Viscosity_def.html (Princeton University)] </ref>

==Notes==

==Notes==