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Bernouille's Equation (Water through glass tube)?
I've literally been going at this question for hours and it's the last one I need to finish.
Here's a link to the diagram and question: http://img600.imageshack.us/img600/6932/tubequesti...
Anyways, here's what I tried:
P1 + 1/2(Rho)(v1)^2 + (Rho)(g)(y) = P2 + 1/2(Rho)(v2)^2 + (Rho)(g)(y) -> no change in y so term 3 is 0.
Put v1 in terms of v2
A1 = 1/10(A2)
therefore v1 = 10(v2)
P1 + 1/2(Rho)(10 x v2)^2 = P2 + 1/2(Rho)(v2)^2
P1 + 1/2(1000)(3)^2 = 200000 + 1/2(1000)(.3)^2
P1 = 200000 - 4455
P1 = 195545 Pa
Answer key says: 1.55x10^4 Pa
A in the diagram represents cross-sectional area. For a cylinder A=(pi)r^2.
A1v1 = A2v2 = Q
1 Answer
- SherryLv 41 decade agoFavorite Answer
The textbook uses the same question as an example on pg 310, step by step, with the answer right there.