Recent content by nobodyuknow

Would the first step be setting all those current sources to 0? Thus left with the remaining voltage source and the two resistors? http://img820.imageshack.us/img820/2318/q2z4.png

Homework Statement Above given is the circuit I am supposed to simplify where the 1/5Ω resistor is the load. I'm unsure how to convert this circuit into an equivalent Thevenin Circuit. Homework Equations V = I*R (Ohm's Law) The Attempt at a Solution Using Microcap and it's...

Thanks, that was a mistake sorry So basically use the integration rule and integrate te^t and then apply the Heaviside function? I'm sorry, I'm not too confident with the Integral method, but.. integral{te^t} = (t-1)e^(t-st) I'm not sure how to work from there. [Googling Heaviside...

Homework Statement Laplace transform: te^t*H(t-1) Homework Equations L{te^t} = 1/(s-1)^2 L{H(t-1)} = e-s/s The Attempt at a Solution Using e^(at)f(t) -> F(s-a) with..e^(1t)H(t-1) We can get, e^(-1s-1)/(s-1) = e^(-s-1)/(s-1) [I think?] Thus applying tf(t) -> -dF/ds Derive[e^(-s-1)/(s-1)]...

Homework Statement 120 mol/min of Propane (C3H8) is burned in the presence of air (21% O2 and 79% N2) in a furnace, two reactions occur: Complete Combustion: 67%, propane is burned to CO2 and H2O Incomplete Combustion: 18%, propane is burned to CO and H2O Oxygen is supplied at 70%...

Basically, this 1s3 2s3 2p6 3s2 3p1 violates Pauli's Law because of the third electron in the 2s orbital.

Pauli's Exclusion Principle... each electron in an atom has a unique set of quantum numbers which must abide to a specific criteria... where basically, any orbital can only contain a maximum of two electrons. Ahh, when I actually bother to read my notes, I see that p-orbitals have 3...

Homework Statement Here are the following Electron Configurations of Phospohorus 1. 1s2 2s2 2p6 3s1 3p4 2. 1s3 2s3 2p6 3s2 3p1 3. 1s2 2s2 2p6 3s2 3p2 3d1 4. 1s2 2s2 2p6 3s2 2d1 3p2 5. 1s2 1p6 2s2 2p5 6. 1s2 2s2 2p6 3s2 3p3 Questions: Which of these have non-existent orbitals...

Fair enough then, I have a Chemistry Prac in a bit so I don't have much time to calculate it, but, would the end result come out to as what I have gotten? Or is there a mistake that needs to be corrected here? Thanks, I appreciate the feedback.

This was my first homework question, I assumed it was correct since the tutorer looked at it and ticked me off, but, this is the question where I dragged my error from... Attempt #2 (t²-1)H(t-2) + (0-t²)H(t-3) (t²-1) = (t-2)²+4(t-2)+4-1 H(t-2) [(t-2)²+4(t-2)+3]...

Aha, that's not a problem at all, I'm assuming a lot of what you've just mentioned is something I'll be coming across in my course :)

Thanks BruceW, unfortunately, I did not know that, going through my lecture notes and slides, there's no information on double checking our Laplace Transforms. Thanks a lot for telling me this, I'll Google it later to do a little bit more research on it! And Ray Vickson, much appreciated, I...

Ah, it's a mistake carried over from a previous homework question I've done. How would you go about substituting in values of 't' in order for it to validate my f(t) value? For example... cos(2∏(t-3))H(t-3) - cos(2∏(t-6))H(t-6) And substitute in 0, cos(2∏(0-3))H(0-3) - cos(2∏(0-6))H(0-6) is...

Homework Statement Rearrange f(t) using Heaviside Step Function Then Rearrange it so that the Laplace Transform can be written down Then, Write the Laplace Transform of f(t) Homework Equations The Attempt at a Solution So my first step is as follows... Using the basic Piecewise Function in...

Could you possibly do this... y'' + 4y' + 3y = f(t) y'' + 3y' + y' + 3y = f(t) d/dx [y' + 3y] + [y' + 3y] = f(t) let u = y' + 3y u' + u = f(t) Would that be correct?