Recent content by Jeno

Hi, i am running a hard disks molecular dynamics simulation. I would like to compare the radial distribution function obtained from my simulation with the theoretical radial distribution function. May i know what is the theoretical radial distribution function? Or what data do people normally...

Sorry, i have typed it wrong. The expression should be as follow: a=-(r/2r2)( +- (4r2c + (b · r)2 )1/2 + r · b ) where r is a vector with direction of a and length of r. Thank you.

a=-(r/2r2)( +- (4r2c + (b · r)2 )1/2 + r · u ) This is the expression i meant. Thank you.

So is it similar to the normal quadratic equation where b2 - 4ac < 0 gives no real solution? ok, then i understand. But i still don't understand how the book get the the expression above. I think the expression above should be valid, since it is written on the book, but i just don't know how...

Ya, i think a2 = a · a . Is there any other definition for a2? So, if i don't know the direction of a, then i can't solve for a is it? I think, in my situation, i can guess the direction for a. Let's say if i know that the direction of a is r (a vector with magnitude of r, such that r/r is...

Hi, I think a2 should be a scalar with the magnitude of the square of the length of the vector a. Is there any problem with it? Do you know how to solve this equation? Thank you.

Homework Statement (a)2 + a · b - c = 0 a and b are vectors which (in general) with different directions while c is a scalar. How to solve for a? The Attempt at a Solution (a)2 + a · b - c = 0 (a + (1/2)b)2 - (1/4)b2 - c = 0 (a + (1/2)b)2 = (1/4)b2 + c In...

Oh, Ok. thank you very much. I understand already. thank you.

Thank you Vanesch. I get what you want to say. You are trying to say that, when the pulse is formed, from the general solution, f(x-vt) + g(x+vt), we know that the pulse will travel in both ways, just like russ watters has told me. However, when the pulse is traveling in one direction, the...

Thank you for your explanation. I get some picture after reading it (although i still need time to understand it completely). Most of what i found on here are explaining the mechanism of PLUCKING the string or INITIATING the pulse. I have understand that part, thank you. However, i still...

how can i post my diagram if i have no scanner? which program should i use to draw it? AngeloG, can you post your diagram? thank you. oh, so if i pluck the rope anywhere (not exactly to be in the middle) but not the ends of the rope, the pulses will be in both direction? but how to explain...

consider a pulse traveling down a stretched rope. what makes the pulse to travel in a particular direction (let say to the right) and not the other?

Can i know how does the Lorentz transformation equations are derived? x'=Y(x-vt) y'=y z'=z t'=Y(t-vx/c^2) Especially the equation for t', what is term vx/c^2 there implies? thank you for answering me. -Jeno-

Ya, i think this is a good way, but i can't find any suitable transparent tube to do this experiment. i think even though it is a damped oscillation, it will finally stop at the equilibrium point, except those overdamped oscillation. but the can can come back to the equilibrium point once...

But in the experiment, the can really rolls back. So can you explain this? But when the can is rolling and winding up the rubber band, the rubber band will unwind at the same time, with a smaller rate. Therefore, it will give both the can and the rubber band a torque in opposite direction...