Recent content by james weaver

Hi, so my objective is to find Io, and I've attached a picture of my work. Here is my question: At the point Vo1, if I use the equation for finding the output voltage for a non-inverting op amp I end up getting this: $$V_{0{1}}=\left( 1+\frac {r_{f}} {r_{1}} \right)V_{s1} = \left( 1+\frac...

Hi everyone, this is my first post in the chemistry section. I am doing a project for my engineering class on "cutting edge" materials and the one I chose is hexagonal boron nitride (specifically in the form of nanotubes). In comparing hBN to graphene, I need to explain to the class why graphene...

Ahhh, that's very helpful. Thank you.

No I suppose not. I guess a would have to be in units of c/m^4? In which case my final answer for E would be correct. I just assumed c/m^4 made no sense since we live in 3d space

I would get c/m^3, which would indeed be volumetric charge density. But I don't understand how c/m^4 makes any physical sense.

Well it wouldn't make any sense if a were in units of c/m^4, would it?

Sorry, forgot to mention. I believe a is units of c/m^3. In which case my final answer is in coloumb-meters and not coloumbs. Still waiting on confirmation for the units.

I've attached what I have so far. Used Gauss's law, everything seemed to make sense except the units don't work out in the end. The charge density function if given by: r(z)=az, where z is the perpendicular distance inside the plane.

I believe I am doing everything right up until the point where I have to try and find a recurrence relation. I honestly have no idea what to do from there. I've listed my work in getting the powers of n and the indicies to all match. Any help appreciated. Here is the original DE...

Thanks guys for these very helpful responses.

Ok, I understand the math. I guess I'm just confused then as to what force accelerates the water from ##\vec V## to ##\sqrt2\vec V##. Guess I have something to learn about fluid dynamics.

I'm sorry, I'm confused on how the water could flow across the tip surface at a greater velocity than it's initial velocity.

Sorry, I am not very familiar with some of these concepts. For one, I am just assuming that the propeller blades are rectangles that are at a 45 degree angle relative to the axis of rotation of the shaft. Secondly, since I don't have info on the rotational inertia of the shaft, I am trying to...

Energy conversion driven by water flow

Homework Statement:: project not homework Relevant Equations:: vectors Hi,I am trying to determine the maximum linear velocity of a propeller tip when subject to flowing water with velocity ##\vec V##. For simplicity, I will assume that rotational inertial is negligible. The drawing below...