Recent content by danjordan

I am working also on building a VSM and I'm a little lost as to how to collect the data. From what I see on other papers and thesis their LIA output always comes out as a positive value, but I get values that fluctuate from positive to negative very near the frequency of oscillation of my...

Thanks to all and especially strangerep :) My ego is thankfully under control, I've also had learn how to do that and will swing by here more frequently. I guess I was just venting a little because I really want to learn this stuff because I love it, it's mighty fun, I just don't feel I'm...

I'm taking (undergraduate) Nuclear Physics this semester and while it's going well the kind of comments and attitude I'm getting from my professor confuse me. He dismissed Kenneth Krane's Nuclear Physics book when I told him I was studying from it. When talking about the Dirac equation and Pauli...

I was reading about that from here http://www.math.ku.dk/~gimperlein/dif11/dif11_kim_stationaryphase.pdf but saw no such symbol. What's your source?

I agree what you said about buoyant forces, but in this case it's hydrostatics, so fluid flow is something else. Also, no variation in density is being considered, so that part of the comment doesn't help here. I think I can say "oppose" just fine in this case because shear forces do not come...

But there's still gravitational attaction between the objects, right? Wouldn't they eventually come into contact?

Hi Nugatory, what do you mean by the linear approximation?

I understood the original question differently. What if we have a +q charge inside the shell, but the shell on its own also has a +q charge? Would the inside charge also attract electrons leaving the outside of the shell still more positive? Then there would still be no field inside the...

I found these resources a couple of days ago and they are really useful: Al's Relativistic Adventures: http://www.onestick.com/relativity/ World Science U (with Brian Greene): http://www.worldscienceu.com/

Sounds like an interesting way of designing a workout program. I'm going to suggest an experimental way to do this, since the calculations written before me are similar to what I would have done. How about modifying a digital scale so that it records weight vs time (I'm assuming a commercial...

Is the table not moving with respect to the spaceship or is the spaceship "not moving"? In any case, assuming a spaceship lost in space far from any planet or star and detecting practically no external gravitational field, if the objects are in contact you could say that there is a normal force...

Thanks to all for your messages. So what I've gathered, to sum up the previous comments, is that both liquids (and I'd guess any number of fluids where a solid is inside) generate a net buoyant force which is due to the difference in pressures. This buoyant force can be analyzed in its...

[Mentor note: This thread was moved from General Physics due to it being homework related] A friend and I were reviewing problems from a GRE subject which read: "A layer of oil with density 800 kg/m^3 floats on top of a volume of water with density 1000 kg/m^3. A block floats at the oil-water...

Hi everybody, thanks for the many responses and sorry for the lateness in mine (midterms have taken much of my time). I'll be checking out the suggestions you all made. To clarify, the teacher has recommended many books but doesn't follow the progression of anyone in particular (which means we...

Hi everybody, I'm taking Quantum Mechanics 1 this semester. Thing is many of my classmates and I feel the professor is horrible and not a good teacher. He is often disorganized and unprepared for class. Problem is there's no way to change him so we're stuck with him. He apparently wants to...