volume of liquid in bottom of a vertical cylindrical tank with parabolic bottom

Hamid... If you have a background in Calculus, I can provide you with the procedure.

The shape, if you don't already know is called a Circular Paraboloid. But, to solve it you have to provide some dimensional detail in order to "find" the constants of the parabola equation which takes the form, AX^2+BX+C.

An aside for those interested:

a) anyone know the difference between a parabola and a catenary?

b) can you provide examples where they are used in everyday objects?

Regards, Phil
 
S
Either Excel or integral calculus should work fine. Divide the solid up in discrete elements like concentric cylinders or stacked plates and add up the volumes.
 
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