- #1

grandprix

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I came across a problem involving a spigot. In order to find the velocity in the spigot which is located h meters in the tank, one uses the reduced V= sqrt (2gh) equation... how is this different from using V1A1 = V2A2? When would you use this equation?

For instance, say you have a tank filled with a fluid with 2 spigots located at the same depth on each side of the container but spigot A has a larger cross sectional area than spigot B. According to my notes, the velocity will be the same in each but the flow rate will be greatest at A.

why wouldn't you use V1A1=V2A2 and say that spigot B would have a larger velocity given that it has a smaller cross sectional area?? I get that they used bernoullis for this one.. but i don't understand why the other equation wouldn't work either..