Recent content by lluke9

Thanks, I think that cleared it up for me a lot more! I've been thinking a lot more about this after your response... From what I understand, it seems that what we call a variable is really case-dependent, as you showed in your gravity example. So a constant is a constant only in respect to...

[SIZE="3"]"Glossary"... kind of important -------------------------- x ⇔ the 8-digit number. Dn ⇔ Digit. z ⇔ place-value exponent of a given Dn. (Dn x 10z) n ⇔ number label of any digit Dn. m ⇔ 9 - n. Specifies to what multiple x should be rounded down to given n. R(x) or any variations thereof...

I know this is a very elementary question, but I suddenly realized in calculus that I don't really know precisely what the definition of a variable and constant was. I know what people tend to call constants and variables in something like: ax + by = c, where you'd call x and y a variable...

How do you use "albeit"? Apparently I have to show my mastery of the English language on the upcoming AP English exam on Wednesday (or is it Monday?). So I decided to learn to use a word I've known for a long time, now, but have never bothered to learn to use efficiently. It's one of my most...

But I've done no work, right?

Thanks for help-- you've restored my faith in classical mechanics xD But another question... what if I moved that positive charge away from the capacitor so that it is no longer in the field? And I moved it in from the top, so it gets potential energy? Okay, I'm pretty sure I'm doing something...

So say we have a uniform field of magnitude X. Let's say the force that the field exerts is dependent on a particle's mass, M. Now say we move the particle D distance against the force of the field, XM. Our potential energy will be equal to XMD, because we exerted XM force over distance D...

Hummm... Your problem arises because of something like this:v = gt, but... v = 1/2gt too? That's because on the first equation, you were finding INSTANTANEOUS velocity, so therefore INSTANTANEOUS EMF. On the second equation, you somehow got average velocity... I'm still trying to figure it...

Is this even possible? Since light is an electromagnetic wave, creating an alternating current will create fluctuations of electric and magnetic field and will... make light? I highly doubt this is possible, but I thought it was worth asking to see why it CAN'T happen.

Apparently, that's how a lot of car speedometers work... but I don't understand how a rotating magnet inside a coil (or any conductive material, really) can induce a current in the coil. I can understand how pushing a magnet in and out through a coil can induce current, because Flux = Area...

I don't really understand this integral stuff. as I haven't taken calculus or AP Physics C yet, sorry... Is there a simpler explanation? Also, why is there a constant electric field between capacitor plates? If I put them EXTREMELY far away from each other, there's no way the field in...

Okay, say we have one positive point charge, and one negative point charge. Their charge values are exactly opposite (q and -q). And say we place them a certain distance apart and hold them there, maybe creating something like a point-charge capacitor. These point charges can hold and transfer...

Oh, I assumed a battery was like a capacitor in that it was just two terminals with opposite charges, like capacitor plates. Okay then, scrap that.But yeah, V = kq/r is applicable to point charges. I wanted to stay away from charged spheres for simplicity's sake.

Voltage difference = Infinity? So if there was a Q Coulomb point charge and a -Q Coulomb point charge with X meters of separation, and I wanted to find the voltage difference between those two charges... How would I do it?Since V = kq/r + kq/r in this case, wouldn't I have to divide by 0? V =...

So could you substitute for voltage in the capacitance equation? C = q/EΔd Then E_T would be: E_T = kq/r^2 + kq/r^2 because E = kq/r^2 and both electric fields are going the same direction. And then I'd arrive at the same thing I did in my original post... E_T = net electric field