Recent content by ksukhin

Thank you for explaining everything!

So does that mean my C distance would be 5.75+1.25 = 7" - which is up to the furthest point on the wall thickness. How would my cross section look as far as tension/compression? Initially I thought that half the wall thickness would be in tension and half in compression. Since I'm looking at...

2 separate cases, first along X axis and then along Y axis starting from the centre line. So can i think of this case as a cantilever beam with a load at the end? So M = (3300)(35)= 115500 lb-in Ix = 2 [bh3/12 + Ad2] = 2(270.11) = 540.22 in4 from my understanding, C is the distance from the...

Homework Statement find bending stress in x and y dir Homework Equations I = bh^3/12 + ad^2 Stress = Mc/I The Attempt at a Solution I = bh^3/12 + ad^2 Stress = Mc/I see attached calculations My prof gave us a question where we have a motor (20" tall) sitting on a frame with a load of...

Sir you have nothing to apologize for, the one who should be apologizing is my professor for simply feeding us the final formulas without any derivation or explanation for that matter. We did not cover the derivation in class, and as you mentioned, the book leaves out a lot of steps so it's not...

Yeah...seems like I'm going to fail this class because I have no idea what's going on. I am trying to follow your derivation and what my book has and nothing clicks. I get the idea of boundary conditions. When x=L my BC becomes Qcond = Qconv. My book doesn't offer any explanation at all. It...

No worries, I appreciate the help.

Here's the scope of the project and my initial calcs, this is the same way we do it in class.

I've never seen that formula before...and to be honest we never really start with a differential equation. The only time we've derived is when we start with Fourier's Law of Conduction (Qx = kAc dT/dx) and the definition of a derivative, in order to find the temperature distribution equation...

Here's the calcs I did, and the diagrams I was referring to ("book" and "table")

Thank you for the explanation. However my professor taught us that the "easiest" way to calculate Afin=PL - where P is perimeter of cross section. If I am neglecting the sides, then that formula should not apply. Yet, I've seen it used with rectangular fins (not just circular) hence it's...

I know that it is assumed in my case that heat transfer is 1 directional (normal to the cross section) however that does not explain why the lateral sides are not included. please see this http://physics.stackexchange.com/questions/244253/finned-surface-corrected-length/ , it explains...

I am working on a project and I am having difficulty understanding a concept I have to analyze a rectangular fin in 2 cases (Adiabatic tip AND Convective tip) and I am having difficulty understanding which surface area to use. For the first case, I want to find Afin which according to my book...

I'm doing Sturm-Loiuville problems and I need to find the eigenvalues for λ I'm having difficulty understanding the trivial solutions for the hyperbolic sin and cos when they equal 0. I know that cos(x)=0 when ##x= π/2 + πn = (2n+1)π/2## sin(x) = 0 when ##x=πn## What about cosh(x) and...

Not necessarily. You have to solve for vapour quality (X) and check what state your fluid is in. X=mvapor/mtotal Wet steam - generally means that it's not "superheated" - meaning that 0<x<1