Recent content by stinlin

Well the water would always be above the crest, but what ended up being the deciding factor was that the weight of water pulling was never going to be greater than the weight of water needing to BE pulled. So after the water line dropped to below the crest, the siphon would break. Found a...

That makes some sense - my only question is that if there is water in the pipe up to the gate valve (There should be, right? Because that portion is below the water line?), why won't the water force itself down the second section of the drain pipe (after the gate valve) and start the suction...

Interesting - could you explain WHY it won't work Bob S?

I think what you're describing would be the idea of pressure equilibrium...Which is great and all, but I know that suction develops, hence why you can use a hose to drain a pool or a gas tank. :P E: I'm working in gage pressure, so the negative pressure is actually just some pressure below...

Yeah, that much I understand. I'm trying to determine at what point the water level in the tank will not make it over the hump in the pipe. After some running some numbers with assumed values and approximate friction factors, I'm getting an exit pressure of about -824 psf full, and at 1' of...

Hi all - I'm working on the analysis of a siphon assemble for a water tank. I've attached a crude picture of what I'm working with. As you can see, the water starts in the tank as given by the water table at about 8’-8” from the outlet pipe at the bottom. The entrance into the suction end...

Heh - I figured it out. I had to solve it three different ways to show that virtual work can be applied to any indeterminate structure released to a stable state (i.e. if there's n degrees of indeterminacy, you can release n reactions/supports to make it a determinate structure). :) Thanks...

How do you go about solving an indeterminate beam for various deflections by virtual work? I'm kind of at a loss right now and can't proceed on my homework. I've attached a picture showing the problem I'm confused on - I don't know how to go about modeling the virtual model so I can find the...

Homework Statement Find deflection at point of load application. Homework Equations See attached. The Attempt at a Solution I know the equation to use, but I have NO idea how to apply it here. Also - can't use virtual work. The problem explicitly states real work. How on Earth...

I didn't know where to post this since these forums are missing the best field of engineering (Civil/Structural). :wink: Anywho, I got to thinking about this situation - a simply supported beam (or indeterminate to the nth degree even), or even a cantilever, with multiple concentrated...

Would the graph of a brittle steel with a flaw in it (from load 0 to sharp-notch strength, or SNS) somewhat resemble a graph of f(x) = (e^x) - 1? I know this seems like a weird question, but I'm analyzing some data gathered at the lab, and I can't seem to make sense of it.

Homework Statement A sled slides along on the snow on a thin horizontal layer of water between the ice and the runners. The horizontal force that the water puts on the runners is equal to 1.2 lb when the sled's speed is 50 ft/s. The total area of both runners in contact with the water is...

This is an engineering Dynamics course. :-P And yes, I'm assuming it to start from rest.

Homework Statement W = 20 lb k = 50 lb/ft r = 4 in. Initially displaced 0.5 in. Determine the frequency and maximum velocity of the wheel (which rolls without slipping). Homework Equations (theta) double dot + (w^2)theta = 0 (x) double dot + (w^2) (x) = 0 t = 2*pi / w...

Homework Statement Find the shear and moment diagram. Homework Equations dV/dt = -w(x) dM/dt = V(x) The Attempt at a Solution See attached. My problem is that I'm getting 0.06 kip*ft at the end of the beam, and I don't think that's right.