Recent content by freddyfish

I really appreciate all your answers, but I was hoping for it to bring up some kind of discussion of your thoughts and not restatements of the laws of physics and how they are based on fundamental observations and laws of nature. Once again, I would like to state that I wrote "aside from that...

Well, I am aware of that, even though I formulated that sentence very badly, not being sure what other word to use to eliminate the ambiguity. (I am sorry about that). In fact, that is why I wrote "aside from that digging deep enough, all scientific facts are based on theories that have been...

Thermodynamics is clearly based on the assumption that energy is conserved. I ended up discussing this assumption with a fellow student, who states that this assumption can be rigidly justified and means that Noether's theorem proves this. Everywhere I have read about it, the conservation of...

I am taking this introductory course on quantum mechanics. I am not very satisfied with the "shallowness" of the literature intended for the course, and I would like to buy a better book. Does anybody have any recommendations? Thanks :)

Hey No, I am unfortunately not looking for the answer to the equations. I am asked to come up with a specific set of differential equations to later apply to a dynamic system, where the latter is not of any interest for the moment. However, the equations I derived are not nonlinear, and in...

I was asked to formulate the equations governing the rotation of a body moving without any external moments acting about its centre of mass in terms of a coupled system of first order, nonlinear differential equations. I decided to go with the Euler equations, and I ended up with this...

Thank you guys very much! I really appreciate your time and effort. I seem to have quite a bit to go, but soon I may have my own robot army. :biggrin:

Hi I am asking the question here since I am hoping there are some robotic engineers (or anyone else) that may have some good tips. I am pretty new to the area of programming PICs and the "lessons" I have found is about assembly code. I have read that assembly code is better when it comes to...

There is plenty (and very good) information about lock-in amplifiers, so I have read my fair share. Therefore I have got an intuition what the sensitivity of the lock-in amplifier would specify, but this wasn't enough for a reliable conclusion. Your guess makes sense, but the ratio mentioned is...

Hey I have a quick question whose answer is well-hidden on google since the key word of the search attempts is sensitivity, which of course returns results about phase-sensitive detection, and seemingly phase-sensitive detection only... My question is what the exact definition of the...

Thank you! I was thinking about buying one of those kits, but I wanted to check twice and get somebody else's opinion. Your answer was very helpful. :smile:

Hey I have decided to learn about PIC, but I could use some tips when it comes to compilers, programming boards and the other basic stuff you need to do all the things a beginner would like to do with PICs. I'm planning on learning more than just the basic stuff, so gear that is versatile may...

Thanks for your answer :biggrin:

Hey In many places on the Internet you can read how the Nyquist frequency must be at least as high as the signals bandwidth in order to properly reconstruct the signal. Isn't this a big misnomer, since it is not the bandwidth, but the highest frequency of the signal that determines the...

I have indirectly sought the answer to this for some time (since I studied an introductory course in optics 'long' ago), but nobody has been able to give a satisfactory answer, and I have not been able to find the exact answer on the Internet either. My question is about optics, and more...