Recent content by anap40

What you did would be correct if the electric field from each infinitely small piece of semicircle was in the same direction. You need to integrate the field caused by each infinietly small piece of semicircle.

That should be correct. Try 360-11.6 = 348.4, which is really equivalent but that my be what they are looking for.

Here is my work. The last step was to sub back in for b^2 and multiply by 4 (because there are 4 sides of the square) http://img256.imageshack.us/img256/1089/imgxj3.jpg

OK, thanks for pointing that out. I re did it and I got what I think is probably the correct answer.(it wasn't that much different than the other one, I just change one varable into terms of a before integrating.) E=KQZ/[(z^2+(a/2)^2)(z^2+(a^2)/2)^.5] So, now when making z>>a I get the formula...

Homework Statement A square of side a located in the x-y plane and centered on the origin carries a total charge Q uniformly distributed over its circumference. (a) What is the electric eld at any point on the z-axis? How does the eld behave far from the square? (b) An electron...

I need to calculate the electric field caused by a square of wire. I can get the field caused by the sides of the square that are perpendicular to the x-axis but I can't figure out how to get the field caused by the side parrallel to the x axis. here is an image of the problem...

Ok, but should I assume that for part a it is diamagnetic, because it adds that in part b. Does being diamagnetic have any effect on stability?Correct me if I am wrong on the following: For Mn^0, isn't the e config [Ar]3d^5 4s^2 with all 5 of the d electrons unpaired? Then for Mn^2+, the e...

Ok I figured out part c. It has to do with the F being more electronegative than H so on PF3 the electron density around P is lower which allows more back bonding to occur. I am still not sure how to do part a, examples in the book that asked for oxidation state give the charge of the complex...

The Question a)If manganese reacts with CO and PH3 ligands to form a stable, tricarbonyl 5 coordinate complex, what manganese oxidation state and charge for the complex can be expected? Why? b)If the complex is diamagnetic how is manganese hybridized and what is the geometry of the complex...

The higher the altitude the lower the partial pressure of H2O so the boiling point is lower.

OK, thanks. The equation you gave is just a rearrangement of mine, but I think that I was using the angle between the ground and the radius extending out to the contact point of the mass. If i did it that way I guess I would just have to use sin. I got the correct answer now, thank you.

Thanks for the reply. Is this diagram correct? http://img172.imageshack.us/img172/475/33347115yw1.png So the equation should be centripetal force + normal force = cos(theta)mg?

Homework Statement A small block starts at rest on top of a frictionless hemisphere (like an igloo) of radius 1.7m. Then the block slides down from the top. At what height above the ground (in m) is the block moving fast enough that it leaves the surface of the hemisphere? Homework...

Thanks again doc, for some reason I just figured that the roller was only a horizontal component. It turns out that the force is actually perpendicular to plank.

to do that you can use that fact that the object is moving at the same speed but opposite direction when it passes the same height on the way back down from it hieght. For example if a ball is thrown up at 5m/s when it passes the height that the thrower released it at it will be moving at 5 m/s...