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-----Original Message-----
From: Phys-l [mailto:phys-l-bounces@phys-l.org] On Behalf Of Chuck Britton
Sent: Wednesday, January 29, 2014 5:52 PM
To: Phys-L@Phys-L.org
Subject: [Phys-L] Another Fluid/Density 'Problem'
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An Old Fashioned Glass Milk Bottle with a narrow neck is delivered to your
doorstep in the morning and because it is no homogenized, the Cream has
risen up into the narrow(er) region.
The fluid pressure exerted on the bottom of the bottle is (rho) g h.
Where (rho) is the average density of the column of milk/cream that extends
from the top surface to the bottom.
Now we will thoroughly MIX the bottle of milk and we note that the average
density of this same column of milk is GREATER than (rho). Let's call this new
density (RHO).
How can the pressure have increased while the area of the bottom has
stayed constant?
How can we accept a greater amount of downward fluid force caused by
'just' mixing the milk?
(This is reprised from back in the last century.) Probably presented better
back then.
;-)
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