Recent content by Irrelativity

What about variable r? is r from the center of the wire or from the center of the cavity? right now I am working on r from the center of the cavity.

Do I have to assume that the current is steady or varies within the wire? The problem did not state that the current is steady (looks like it really doesn't matter but just in case). And when you find the magnetic field inside the cavity, you do have to take the vector components into the...

Homework Statement A long straight wire of radius R carrying a current I has a circular portion of radius a cut out at a distance d from the center, as shown in the picture. Find the magnetic field inside the cut-out portion. Homework Equations magnetic field equation (I can't write it...

Thanks for your help. But I still not comprehend the last approximation method part. How come x^3 still survives when the other terms vanish?

I have a question about projectory motion. I know that if ball is thrown by a person with a initial velocity v(only x and ycomponents), a maximum distance d (distance of x component) can be achived at angle of 45 degree (an angle between the initial velocity and x component of the velocity)...

If this is the case, the above polynomial becomes r = -R/2 if you use (r/R)^2 = approximately zero. But the solution to this question is, I believe, r = R(m/3M)^(1/3). Am I missing something here?

Hi this is my first time posting on this forum. I have an question about Lagragian points. I was trying to find L2 lagrangian point, a point that lies on the line defined by the two large masses, beyond the smaller of the two. Here, the gravitational forces of the two large masses balance...

Most of its energy will be converted to viscous heat and more money will be needed to do this kind of thing than nuclear bomb.