# Continuity Equation

For the continuity equation (Q= Av, A is cross sectional area, v is velocity), is it independent of the radius of the pipe? If so, why?

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Defennder
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Well, is A independent of the pipe radius?

GT1
A=$$\Pi$$*R^2

For the continuity equation (Q= Av, A is cross sectional area, v is velocity), is it independent of the radius of the pipe? If so, why?
The cross-sectional area is dependent on the radius.

The velocity must increase as the radius decreases to allow the same volume of fluid to pass through over a given time.