A glass tube of uniform cross section is...

A glass tube of uniform cross section is connected to a tap with a rubber tube. The tap is opened slowly. Initially the flow of water in the tube is streamline. What should be the speed of fl.ow of water to convert h into a turbulent flow?
[Given : radius of the tube=1cm, `eta=1xx10^(-3)` Pas and Reynold's number=2500]

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