 Quote by Aj83
So say tap is open to some specific flow rate, if you put a nozzle (a converging shape) at its end why does the velocity increase? or why does velocity increase if you put your finger such that its blocking the exit partially?
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Assuming that the driving force, e.g. hydrostatic preasure is constant, the flow (i.e. the mass or volume transported per unit time) does not depend on the section of the tube. Therefore, by forcing the same flow pass through a narrower tube you get higher velocity.
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