Recent content by DD31

I see what you mean. Got it to work; I used m=2. Just takes a little guess-and-check. Thanks

I'm having the same issue with this same problem. Just to rephrase the formulas, Constructive Thickness = \lambdam / 2*n Destructive Thickness = \lambda(m-.5) / 2*n I figured the same; that we wanted to maximize blue reflection and minimize red. So far, I've tried solving for the value...

Alright...so I've found part a. dI = I*n*dx; I was the current in the wire, so the current from some bundle of wires dx wide is I*n*dx. Makes sense. Now, for b, I'm trying to find some way to use coils or rings and find the field "above" one of those, but I'm searching for a place to use this...

Sorry for the bump, but I'm still flat-footed on this one. I'm going to look at it more tonight extensively, but I'm not quite sure where to even start to find dI.

Homework Statement A tightly wound solenoid of length L and radius a that has n turns of wire per unit length carries a current I. Calculate the the magnitude of the magnetic field at a point P on the axis of the solenoid, outside it and a distance y from one end, as shown in the figure...

haha...wow. I see it...it just should be + 4d^2. Just put that in and it worked. Thanks a ton...Almost sure I wouldn't have picked that out without doing the whole thing over again. Thanks.

Homework Statement Alright, so I've given this guy a few cracks, and I think I'm close to it, but apparently I'm not right, so here's how it goes. Simple in concept. A meteor moves toward the solar system with speed v0 in a direction such that it would miss the sun by a distance d if it...

ohhhhhhhhhhh...That makes sense. Thanks.

Thanks for the welcome. And your help was awesome. I got the right answer, so let me just reiterate what you said to make sure I get what's going on 100%. So, for finding the maximum angle, we can effectively disregard the weight of the hanging block, since this maximum angle would only occur...

Homework Statement Alright, so here's the problem I've got. I'll write it out first verbatim, then say what I've tried and failed with. One end of a uniform meter stick is placed against a vertical wall (Fig. 11.40). The other end is held by a lightweight cord that makes an angle with...