Recent content by james_a

So I am reading a handout on transfer functions, and I got to this one example that doesn't seem right to me - which usually means I'm missing something. It looks like this: My understanding is that the numerator in H(s) is supposed to be the laplace transform of the input for the...

Thank you for your reply. I wanted to be sure I wasn't missing a more efficient way to go about it. I actually ended finding a fit curve with some stats software, and used that to solve for d, which came out to 37mm.

The problem: The stepped bar with a circular hole, shown in Figure P5.75, is made of annealed 18-8 stainless steel. The bar is 12-mm thick and will be subjected to an axial tensile load of P=70kN. The normal stress in the bar is not to exceed 150 MPa. To the nearest millimeter, determine (a)...

Thank you for clarifying and pointing that out. I would have went along after today assuming Δx was always nearly 0 for reversible adiabatic processes.

Strange. I double checked and the steam table in my physical textbook - which I was using last night - states 0.137, while my digital copy of the textbook, which is a few editions newer states 0.127. That is an interesting question. I think I know how to go about it. Going with vg@200C=0.12721...

Thanks for looking it over! I was really wondering if I was missing something big... or losing my mind.

Homework Statement A saturated water vapor mix in a 0.05m3 piston-cylinder at 200C with a quality of 0.5 expands adiabatically, producing 500kJ work with a final temperature of 50C. Find: a) final quality b) change in entropy[/B] Homework Equations Q-W=ΔU x=(vavg-vf)/(vg-vf) uavg=uf+xufg...