Why are sand filled hourglasses shaped the way they are?

Subject: Why are sand filled hourglasses shaped the way they are?

Date: Thu Sep 29 15:32:01 2005
Posted by james
Grade level: teacher/prof School: No school entered.
City: Jersey City State/Province: New Jersey Country: U.S.
Area of science: Science History
ID: 1128033121.Sh

Message:


I understand that the shape of the hour glass has something to do with the consistent 
flow rate of the sand from the top to the bottom.  Can you explain?

Re: Why are sand filled hourglasses shaped the way they are?

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