Recent content by pooface

Many thanks Mgb_phys and berkeman for your responses! I was thinking with those adapters I linked to, that I would send a pulse and retrieve reflected data and then analyze that data via some software but that doesn't seem to be a good approach. I looked at the lowcost DAQ products at NI you...

Hi misgfool, Thanks for your input. OS: Win XP Adapters: http://www.twindata.com/forvus/3270coax-usb.htm http://www.audiophileproducts.com/usbtospdif I haven't purchased these, just kept them in my bookmarks to investigate what is a good way to go about this project. I'm trying to collect...

Hello there, My project is a Smith Chart calculator/simulator that takes the Zo and ZL of a transmission line and calculates various data like SWR, SWR(dB), return loss, coeff I, E, P, etc. It also constructs and plots on a graphical Smith Chart. I want to take this one step further and...

It is very important that I know this. I was told that there was a k4 at the end but for problems we did in control theory class k4 was said to be 0 always and we took it as a rule. So I need to know where this -2 came from.

Homework Statement Inverse laplace transforms F(s)=\frac{5s-2}{s^{2}(s-1)(s+2)} Homework Equations Residue technique The Attempt at a Solution F(s)=\frac{5s-2}{s^{2}(s-1)(s+2)} = \frac{k1}{s^{2}} + \frac{k2}{s-1} + \frac{k3}{s+2} I solved for K1,K2, and K3, which all came to...

for 2) you want to conduct laplace transform then take the derivative? F(t)=k[e^(-at)] -----> f(s)= k/(s+a) k,a are constants.

good one coomast. I didnt see that. I am new to this because of my control systems theory course. thanks. EDIT: OP, K is a constant by the way.

if c1 had 1500microC to begin with, how can each capacitor end up with 1500microC?

For the main problem, I think you should use impartial fractions to solve it. zeros: 0 poles: use quadratic formula for s^2+2s+10. roots might be complex numbers. Then once you get the residue, apply inverse laplace. 1)inverse laplace transform of 1/s is F(t)=1 by F(t)=k ---> F(s)=k/s...

I don't think the diagram is correct. The boat at 20km/h sets out horizontally (perpendicular to the current BUT since the current is pushing it down, the boat gets displaced diagonally. The boat will still reach the other side, but not in a straight line therefore missing the marina. That is...

Whenever you see that RATE OF CHANGE is being asked of, then this should indicate that you should be using derivatives. Now it is asking for rate of change of the Surface area. So find d(SA)/dt.

I used integral of sin^2(u) du is = u/2 - [sin(2u)]/4 + C When i sub pi in the term sin2u , then this becomes sin2pi which is 0.

Homework Statement Determine the RMS value of fullwave rectified sine wave.Homework Equations RMS = \sqrt{({1}/{b-a})\int^{b}_{a}[(fx)]^{2}dx} The Attempt at a Solution Notes: The Period of a full wave rectified sine wave is pi. a=0 b=pi Let's do square root at the end. =1/pi...

The unit for work or energy is joules not Newtons. In part A you didnt to do 5sin20 because you already knew the vertical distance of 1.7m. As for part C, are you sure that is the confirmed answer? It only looks like the x-component of the force vector to push the block up. edit: yes...

The circuit is an integrator. Yea I believe the voltage out will be the voltage across the cap. Because the cap will charge to its max and become effectively an open circuit. There is a formula for analyzing for an AC source for Vout.