Recent content by Maxwellkid

thank you...

are you telling me QED and quantum mechanics has nothing to do with the exchange coupling mechanism?

how much must I know about the strong and weak nuclear force to adequately derive the Schrödinger equation using maxwell's equations and QED?

why is there a lack of accuracy in this subsitution? \frac{sin\phi}{cos\phi} = tan\phi

i got it...came out correctly... thank you!

okay...it's been corrected...i'll check back in a couple of hours...need to be away from computer

i've made the dl correction in the original post. THANKS. however, the math still comes out to be a bit off...i'm off by a half.

i think you're right it is a unit vector. try taking the absolute value of it...it comes out to 1

how is the Biot Savart law derived?? From where does it come?

z plane refers to the z-y plane. w is the radius of the ring of charge. positive z direction current on top of ring and negative z direction current on bottom of ring (counterclockwise current flow)

Where do i start to derive it?

Isn't derivative of cotangent equal to csc squared?

This is a simple problem if you work with only magnitude and consider the symmetry of a ring. However, I am taking a detailed approach, and I am not getting the correct answer. Could you please look over my math? a evenly distributed ring of charge on the positive Y-Z plane has a current, I...

how does the exchange coupling mechanism work that produce the ferromagnetic properties of materials?

must I merely memorize the derivate of cotangent?