Recent content by Strafespar

I can understand Faraday's law when viewed in this situation: A loop moves into an area of constant magnetic field. I understand this because in terms of the Lorentz force it works and creates the same answer using magnetic flux/faraday's law. Now consider the example of the loop of wire...

the negative particles do contract on the man's reference! It's just that they contract in a way that yields a zero electric field. The normal (rest) length between electrons is seen when in the moving observer- so we are always looking at a contracted density instead of a rest density when we...

Yes, but classically I thought we could treat it like this. The classical derivations of the V/I = R relationship work on principles of elastic collisions and average time between collisions; this is how most intro level classes derive it.

ok. the (change in voltage)/current = Resistance. Below we examine a circuit constructed of a short conductor of resistance R and long conductor of resistance R. Because they are connected to a battery of the same potential V = 4 the potential difference (E*d) will have to be the same for both...

They way I think of it is like this: You initially have two wires connected to the same battery; but they are not connected (incomplete circuit). When the Circuit is connected we assume that the surface charges move in some manner (creates a distribution) which creates zero electric field...

If a resistor of a resistance = 6 ohms is connected to 2 wires of zero resistance (0 ohms) in a DC circuit with a battery of voltage = 12V, the current throughout is 2A. The voltage drop across a 0 ohm wire is V = R*I. Because R = 0, the voltage drop across the wire is 0V. The only way for this...

Oh ok, I think I understand. So is the charge distribution at any particular time representative of the electric field at those positions? I.e. in areas of high charge distribution is there a lesser electric field and areas of low charge distribution a greater electric field (electric field...

Currently using resources like: http://www.matterandinteractions.org/Content/Articles/circuit.pdf http://www.phy-astr.gsu.edu/cymbalyuk/Lecture16.pdf I don't seem to understand why the surface charge densities shown in the pictures are stable. I understand that the densities shown create...

haha wow. He stole my idea..just kidding. I'll admit his videos are probably better than mine, but I guess depending on how well my first video goes (requiring maybe 1000+ views after 5 weeks) I'll make some more..plus I won't be able to work on the videos during that time with the AP, final...

Yes, that is a very good point. I will definitely keep those three rules in mind. I think I should have some figures drawn out ahead of time like you said, it's just that when I was making this video I was sort of copying the Khanacademy approach.

Haha, sorry the hyperlink didn't work. I should have actually used that "preview post" button before rushing out to get dinner... Anyway, yes you guessed the video: http://www.youtube.com/watch?v=6atXoypdqC8&feature=g-upl

Hey, I recently made a video on the intro to Special Relativity for a physics assignment (high school). A lot of the articles/videos I see online are either very general and show only the consequences and philosophy of the laws (like explaining the twin paradox) or are very confusing (wikipedia...

Oh so that's what he/she was asking lol

If you are confused about derivatives in general..All that equation does is tricks the system into finding the tangent of the "original" graph at every single point (f(x) value). If you think about it to find the tangent of a point on an equation, you are basically finding an infinitesimally...

Yeah, a member on the forum suggested I should check out Feynman's "lectures on physics" and then move on to specifics. As for math, I'm gona watch all the khanacademy calculus vids (seems kind of meager but I think I'm really understanding it) and somehow make my way up to partial...