Friday, May 1, 2009

Viscosity

Ah..gotta love molasses on toast in the morning!

Well at least not the cold mornings.  It takes too long to pour.  A term was developed to talk about how hard a substance is too pour.  It is called viscosity.  An over simplification of the what viscosity is that the longer it takes to pour the greater the viscosity.  

So you ask your self what has the highest viscosity?
Pitch..it has a viscosity of around 100 billion times that of water!! So THAT is slow.   My toast would be cold by then!! It takes around 8 years for a drop to "drip" out of a funnel.
Here is a picture

This experiment that has been running for 80 years!  Yes EIGHTY years!! Click here for details.
I thought I read somewhere that it "dripped" again recently but can't find the reference.  Ah well...
Now For the lowest viscosity?  Lets talk liquid helium!!  Now that is one cool substance.
This deserves a post on its own! But for now check this YouTube video on its properties.  This is the first of 5 segments.  But watch them all!!

You must admit UGOTTALUVPHYSICS!!

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