Recent content by Splint

Hi, In the attached image the roots are shown for the characteristic equation. I don't know how the roots were found. Anyone able to help? Thanks Splint

Looks like I got it sorted. Thanks for your assistance wit this.

What is this for your heat engine? (i.e. in terms of T1 and T3) ηcarnot= (T1-T2)/T1 = 1 - T1/T2 Please note that there appears to be a misprint on the diagram. T3 located by Q2 should be (presumably) T2. COPr = Q4/(Q3-Q4) = T3/(T4-T3)

That would be (Th-Tl)/Th correct?

1. An ideal heat engine (HE) is used to drive a reversible heat pump (HP) as shown in figure below. The HE takes in Q1 heat units at T1 and rejects Q2 at T2. The HP abstracts Q4 from the sink at T4 and discharges Q3 at T3. Develop an expression for the ratio Q4/Q1 in terms of...

Thanks Ehild, It's actually a half range expansion. The function is: f(x)= (1, 0<x<1 (2-x, 1=<x=<2 So I believe the cosine function is correct. I won't try and integrate it right now but I should be ok with it. Many thanks Splint

Homework Statement Hi, I'm doing fouier transforms and I'm not sure how to integrate (2-x)cos(nPi/2)x, (1,2). Anyone able to help me out? Even the indefinite integral would be fine. Homework Equations The Attempt at a Solution I guess u would be (2-x) and dv would be cos(nPi/2)x dx. I'm not...

Hi, I found on youtube a video showing the steps to differentiate tan(x). I can follow the steps quiet easily but I'm not sure which rule is being used when substituting u for cos(x) and du for sin(x)dx. So which rule is being used and how do I know which is u and which is du. Thanks

Thanks, that was helpful.

Hi, I've been doing an experiment and I'm now putting the data into a spreadsheet. I started by hanging a spring vertically and adding weights noting the displacement from the unweighted equilibrium point. I put into my spreadsheet a column for finding K using -k=F/delta x. the thing...