Recent content by JLABBER

I see. Ya,One more question, for this method, does it apply only to equation when tan theta= A(1+sin theta)?

Okay, i will try. Such a new knowledge for me, thanks a lot.

Wow, exactly 67 degree can solve for the equation. But, how should i solve equation involving sin and tan simultaneously? I do not have a single idea of solving it. Should we first changing tan into sin/cos?

For my way of solving, First i divide the first equation by the second equation and i get tan theta=rw^2/g Then, i substitute r= 0.15 + 0.12 sin theta into the new equation, tan theta = (0.15 + 0.12 sin theta) (1.5 X 2pi) , After that, i try to rearrange and solve for the theta, but i have no...

Okay, i will check. Thanks a lot. I think the question is taken directly from a book by my lecturer. And the answer too. What do you mean by numerical method? Do you mean that my solution is right but not possible? And this question can be solved with a valid possible answer through that...

Homework Statement Part c: A pendulum is attached to a 0.15m wooden bar sticked horizontally to a table by a string of 0.12m. If the system is revolved with a revolution speed of 1.5 rev per second, what is the angle θ the pendulum make with respect to the vertical axis? Homework...

yes, i know that. That is why i feel the next following solution become not so correct.

Well, i have two conditions which both of them have not been so clear for me. First, two concentric shells (conductors), one with charge 10nC (inside) and another with charge -15nC(outside).Inner shell has radius a and outer shell has radius b. Then, if we are suppose to find electric...

Δv=v? what is the electric potential in a conductor? LETS set the conductor be a shell carrying charge 15nC, then what is the electric potential inside the conductor? should it be just finding v=kq/r? Or we have to find the Δv? Thanks

Ok, but for concentric spheres? Should or can we use the same thing? The answer comes out to be very different with the one my lecturer gives me.

Ok, Thanks for your respond. But,how to get the electric potential for the spheres? I mean any specific terms or formulas we have to use?

But, the answer given is quite complicated. How do we find electric potential for two conductors actually? The inner one is affected by outer one or outer one is affected by inner one or both are unaffectable by any one? Let's say this case, the potential for r > b is easy , that is find the...

Excuse me, may i know how should one calculate the electric potential of two conductors placed together? one inner sphere(radius a) together with another outer shell(radius b). Why is the "electric potential between the sphere and shell" equal to the electric potential in the sphere? LEts put...

Well, if i do, i will seek your help again.ThanKS a lot!

ok.well thanks a lot...