Recent content by physicsfun

can someone explain java recursion to me?

Homework Statement A current loop with area A is placed in region II in the x-z plane, centered at the origin. (Below is a view looking down from y > 0.) If the magnitude of the current per unit length in each sheet is increased (the directions stay the same), the induced current in the loop...

I am supposed to write code to rotate an array 90 degrees to the left... so my question is, why is this code not rotating my array 90 degrees to the left? thanks for any help! public static int[][] rotateLeft(int[][] source) { int[][] result = new int[source.length][source[0].length]...

Homework Statement Write code to rotate an array... Homework Equations why is this code not rotating my array 90 degrees to the left? thanks SO much in advance! The Attempt at a Solution public static int[][] rotateLeft(int[][] source) { int[][] result = new...

Homework Statement For what conditions on sets A and B does A-B = B-A hold? Homework Equations A - B = A n B^c B - A = B n A^c The Attempt at a Solution I know that A = B is the answer, but I just don't know where to start...please don't give me the whole proof, I want to figure...

Thanks so much specialkick23... much appreciated

I tried that and I keep getting the wrong answer, I converted sigma to lamba (charge per unit length) and used the relationship that E = lamba / (2*pi*epsilon*radius). Then I multiplied E by the surface area of the "container", 2*pi*radius*length... but this keeps yielding the wrong answer...

Nope, the question is asking for the flux through the sides of the barrel. Part (a) and (b) of the question asked for the flux through the top and the bottom of the barrel, to which I correctly answered zero.

As far as I can tell the relationship is pretty simple... Flux is simply the charged enclosed divided by espsilon... but obviously I'm not getting something! What aren't I understanding? Or is this particular relationship not applicable to this problem?

Homework Statement A long solid nonconducting cylinder has radius r = 0.65 meters. It has a uniform charge density of 3.7 C/m3. Consider a cylinderical container concentric with the charged cylinder, with radius R = 1.5 m, and length L = 2 m. Calculate the flux through the barrel of the...