More mafs.

[doubleup]

http://www.efunda.com/formulae/fluids/draining_tank.cfm#calc

Cliffs: Boshi is right and the rate for a given hole size depends on how deep the water in the bucket is.

We're assuming a constant flow rate regardless of depth.

Thats a point - the depth of the water reduces faster with the larger hole.  So I don't think its a linear relationship between hole size and speed of evacuation.

[RED-DOG]

http://www.efunda.com/formulae/fluids/draining_tank.cfm#calc

Cliffs: Boshi is right and the rate for a given hole size depends on how deep the water in the bucket is.

We're assuming a constant flow rate regardless of depth.

Thats a point - the depth of the water reduces faster with the larger hole.  So I don't think its a linear relationship between hole size and speed of evacuation.

Ah, I'm with you now. So in the real world, with a constant pressure David's 5.64mm hole would need to be slightly larger to allow for a slower flow rate?