Recent content by schmiggy

Hi Chet, thanks again for the reply. I've taken another look at the problem and my equation, can't we assume the velocity term is 0, because the points are taken at the surface level and we assume that the tank and creek are large enough that the surface velocity is unaffected by the flow...

Sorry Chet - original post has been updated with the relevant diagram. Thanks!

Homework Statement a) Write down the steady-state mechanical energy equation for flow from point (1) (located at the free surface of the creek) to point (2) located at the free surface of the tank. For the purposes of this problem you can assume the pressures at both points are atmospheric...

Homework Statement Firstly, I know posting images and asking for help is generally frowned upon, however in this case given the number of diagrams and equations involved I'm hoping it's warranted. So we're given a diagram as at the top of the attached image and we're asked, given most of the...

No problem at all, glad I could be of help!

Righto, I'll try break it down into steps, starting with a basic example before showing how I got the one you're asking about. Let's start with: \frac{8}{(s+4)^2} Now, we obviously can't do a straight transform, so we need to break it up into parts we can. The easiest way to identify the...

You need to read up on the s-shifting theorem, the second term once you've applied s-shift becomes: 3t^{2}e^{-2t} You were correct that your "n!" wasn't correct, but always work with the base. So our base was s^3, and the formula was s^(n+1), which means n = 2. If n = 2, then the numerator...

You'll get a better definition of the s-shifting theorem if you watch a youtube video or read about it (also known as first shifting theorem) but I can try demonstrate by example. \frac{4}{(s+2)^2} Pretend the inner term on the denominator isn't there initially, so the term would become...

Have you covered the s-shift theorem yet?

L[y] is the laplace transform. L[y] shouldn't disappear. Also you've done the inverse laplace of the RHS prematurely. You need to divide the LHS by (s + 2)^2 to get it to the RHS and L[y] by itself. Before doing that though you need to combine \frac{6}{s + 2} -2s into one term. The final...

Ahhh Laplace.. the bane of my existence.. Firstly, I am not a homework helper so take what I have written with caution and wait for confirmation from someone more qualified. Secondly, the wiki page is correct for first and second diff. I can't comment on your textbook as I've never used it...

Hi, thanks for the reply, and sorry about the format, I honestly thought that would be ok having the question and attempt all in one place. As for the mistake, I had a feeling I couldn't do that, however I don't really know how else I could do it.. my basic arithmetic/algebra skills are really...

*edit* can't upload images from phone with app for some reason, finding a computer. Using the app for the first time so hopefully this works out ok.. I've attached an image with the problem written in blue, and a complete attempt in gray. I have the answer to the question however it is...

Homework Statement See attached image Homework Equations Classification of critical points chart (unless you remember it) The Attempt at a Solution See attached. Now, I'm not entirely sure what exactly I'm doing. With linear systems, the goal is to find the eigenvectors...

I accidentally edited your quote when I was playing around with the latex seeing how it works, my bad! I also accidentally left the d(phi) at the end. I've edited my previous post and that should be correct.. I hope.. or else I'll have a serious case of egg on my face