Recent content by Apophilius

Thanks for the help. I've signed up for differential equations my first semester, so I'll be taking that before I delve into Griffith extensively some more. I was able to follow the first chapter's mathematics, and, as I said, some of the problems I was capable of solving without much...

Hey all. I've recently graduated high school and will be entering college this fall. I managed to get my hands on an inexpensive copy of of Griffith's Introduction to Quantum Mechanics and thought I'd jump on the opportunity to teach myself something I have immense interest in. I started reading...

Maybe it's just me, but I can't locate the attached image

Hello all. I'm a recently graduated high school student entering a liberal arts university. Right now, my intention is to major in physics. But I'm concerned about several things: First, I'm concerned about whether there are any career opportunities for a physics b.s. I've heard that physicists...

So if the resonant frequencies are the only ones that exist within the oven, the waves that are detected are standing. Do resonant wave mechanics apply just the same then for the light bouncing around? And what I said was that blackbodies emit energy, with equal distribution of energy to all...

I hate to be a pain, but can you elaborate more on how exactly they die out? And I had thought that as frequency reaches a certain threshold, the minimum possible energy exceeds that allowed for each wave and therefore they cannot exist. So the statement isn't entirely false, is it? All the...

I've been reading The Elegant Universe by Brian Greene and everything has rolled along smoothly until just recently. He writes: Furthermore: So here's my question. How does the ideal blackbody (which I assume the oven to be in this case) magically know what wavelength to emit to fit...

Ah, right. Thank you.

I'll say it one more time: your period, which is given to you, is related to omega (w) through w = 2pi / T where T is your period. So you can find w. Centrifugal force is a false force. You won't include it in your free body diagrams at all. As for centripetal force, it is only caused by...

The point at which the object starts slipping is the point at which you no longer have any additional forces with which to apply a greater centripetal force. Remember, you don't know r because what you're trying to solve for is r. Applying these equations should get you rolling: w = 2pi / T...

Well when we say "mass is added," this is kind of an oversimplification. Relativistic momentum is increased as per several equations that I won't post here. Furthermore, it's important to note the distinction between gravitational mass and inertial mass, the inertial mass being the one...

I'm speaking of sound waves specifically. Well, I had figured the force would be out of phase by pi radians because the force is directed in the opposite direction of displacement (F = - Cx).

I've encountered a bit of a conceptual problem in my studies and I was hoping someone could help me out with this: I understand that the longitudinal sound wave takes the form of the equation s(x,t) = smcos(kx +/- wt), and that the equation for pressure variance produced by the sound wave...

Remember that the equation of a wave is y(x,t) = ymsin(kx +- wt). In this case its s(x,t) = smcos(kx +- wt). Your equation above takes the form of the latter. Frequency is related to w by the equation w = 2pi f where f is frequency - so just plug in the w from your equation and solve. Also, k is...