Recent content by Omri

Correct me if I'm wrong, but it looks like the ratio should be: \frac{V_O}{V_A} = \frac{Z_S + Z_P}{Z_P} and the presentation says it's inverse. In addition, I don't really understand how the resistors R1 and R2 affect the system - am I supposed to multiply the right hand side of the equation...

Can anyone please help...?

Hi all, I am doing a project on electronics about the Wien Bridge Oscillator. I learned about impedances and operational amplifiers and now I'm trying to understand the Wien Bridge circuit. I'm having some problems understanding it and I would be very happy to get some help. I still have not...

I just saw that these kind of stuff are not permitted here. Thanks for your help, I'll try to find something. :-)

I found "crc handbook" on google books, but I can't find the boiling points of the substances I want. Maybe that's because there's limited access to this books. Do you know any online search engine for that kind of stuff? Thanks!

Hi, I opened a thread here yesterday and it was deleted, I don't know why, I hope I'm in the right forum. I'm looking for a table of substances and their boiling points. The closest thing I found was: http://chem.sis.nlm.nih.gov/chemidplus/" but for all of the substances I searched it...

First I must confess that I have never heard of the term "entire function" or about the factorization theorem. This is probably because I don't know everything about complex analysis, and have never taken a real university course in the subject (hence I wouldn't have a good textbook...). I only...

Hi, I am looking for a proof of the following formula: \prod_{n=1}^{\infty} \left(1-\frac{q^2}{n^2} \right) = \frac{\sin(\pi q)}{\pi q} Does anyone know where to find such a proof? Thanks :smile:

Actually I'm working with fluids rather than electostatics. I guess it's the same but my terminology is more fluids-related. The thing is that I was wondering, if the complex potential let's you model fluid flow situations, will it describe interference? I mean, two sources are supposed to...

Just one more jump and I'll stop annoying you guys...

Please people... my thread is getting down :-)

Hi, For those of you who remember my last thread here, I'm doing a high school graduation project about conformal mapping and the complex potential applied to fluid flow problems. The last time I asked for help you were incredibly helpful so I thought I'd share another issue with you. I...

Thanks to all of you for your help. My mistake was that I tried to solve the integral as a regular integral and not a line integral, so I didn't pay attention to choosing a curve and taking the limits. I think I did it right now, I took your advice and used the simplest curve - first a line from...

Hi, There is some issue about gradients that disturbs me, so I'd be glad if you could help me figure it out. Say I have a scalar field \phi(\mathbf{r}), that is not yet known. What I know is a function that is the gradient of \phi, so that \mathbf{F}(\mathbf{r}) = \nabla\phi(\mathbf{r}). I...

Do you know any internet resources that describe the way to solve such a thing? Clearly I do not intend to copy-paste it, but it's good to have some sort of resource. About the cylinder problem we discussed earlier - I don't know how to solve it, perhaps because I don't know anything about...